In-Wall Smart Relay Switch
The Most Compatible No-Neutral Smart Relay Switch
（Zigbee & Sub-1 GHz Proprietary Protocol)
Smart Relay Switch
Designed for Every Home,
of Any Age.
EVVR In-Wall Relay Switch is a No-Neutral Smart Lighting Product for both new-build and retrofitting projects.
Comprised of a smart relay and a smart switch, smart relay switch supports all kinds of conventional wall switches and can convert any single or multi-bulb setup into intelligent lighting systems. You can control your lights with your conventional wall switches or wirelessly with a voice command with Google Assistant, Alexa or HomeKit Siri, with a tap, or EVVR App.
Always Connected, Always Online
Unlike other smart relay switches and smart bulbs, the Smart Relay part remains connected even if the wall switch is turned off. You can always access and control your lighting system via apps or voice commands like Google Assistant, Alexa and HomeKit Siri wirelessly.
No Neutral Wire Required
No neutral wire required installation opens up more possibilities. Enjoy the convenience of smart lights, save your money and time without spending a fortune to rewire the electrical wires inside walls and ceilings.
Work with All Wall Switches
No need to replace any of your existing wall switches whether it's a modern new home or a classic old house, without without affecting the decoration of the house.
Exceptionally Small
Divided into two parts, the Smart Switch part of the product is kept exceptionally small as nearly a coin. 2 Smart Switches can fit in any electrical boxes to support up to a 4-gang switch panel.
Make Any Bulbs Smart
It works with all kinds of regular bulbs: incandescent, halogen, fluorescent, and LED bulbs. Convert your whole lighting setup to a smart lighting system without replacing a single bulb no matter what type or what shape it is.
Hardwired 3-Way or 4-Way
Supports Hardwired 3-Way or 4-Way Control with your existing wall switches, no neutral wire required and easy installation. You can control same light fixture from multiple conventional wall switches.
Convenience, Safety, and ReliabilityWith In-Wall Relay Switch
In-Wall Relay Switch has been trusted with various certificates from different regions, e.g. CE, FCC, UKCA, RoSH, WEEE.
The unique patented split-type design of smart relay and smart switch allows it to work with the most energy-efficient light bulbs and eliminated safety issues with other smart relay switch products such as electrical leakage during installation and light flickering while working with the low-wattage light bulbs. With no requirement of a neutral wire, In-Wall Relay Switch can work with any house including older houses without a neutral wire present. * For use in houses built before the 1980s.
You can build the most eco-friendly smart lighting system with the In-Wall Relay Switch across a wide variety of sectors around the world, with various smart home protocols: Zigbee 3.0, Sub-1 GHz Proprietary Protocol and Apple HomeKit (Please check HomeKit product page for more information).
Residential
Seamless integrate In-Wall Relay Switch with your favorite voice assistant like Google Assistant, Alexa and Siri or HomeKit ecosystem, turn your connected lights on or off simply with a tap or a voice command, or set schedules and have your connected lights work automatically, for instance, set a "welcome home" mode to adjust the temperature, open the shades and tune the light to a perfect ambiance based on your personal setting; Hallway lights illuminate the way for your movement at the middle of the night.
Workspace
Switching to an LED lighting system can save up to 80% on energy to a modern office space. A smart lighting that puts humans at heart brings a more comfortable, sustainable environment that significantly increase employees’ engagement and productivity. Employees can personalize their lighting for the changing needs, create flexible lighting scenes for different spaces such as meeting room, break room, open area, etc.
Hospitality
With a flexible smart LED lighting solution, hotel can create a unique, welcoming, comforting experience to the guests while saving on energy cost. You can create moods to different spaces with custom lighting scenes, switch off lightings automatically at areas that are not in use and eliminate the need to flip the switches when guests entering the room, creating a more relaxing and enjoyable experience.
Healthcare
Smart LED lighting is a golden opportunity to improve resident experience in the healthcare centers——e.g. hospitals, nursing homes, while effectively lowering facility energy consumption and maintenance costs. Better light quality and color-rendering can increase residents’ safety. Tuned lighting and lighting controls can reduce drowsiness and promote positive emotions and improve comfort in the environment.
Always Online and Connected, Even If The Wall Switch is Turned Off
Without pairing with the Smart Switch part, the Smart Relay performs as an independent device that adds wireless (Zigbee/Sub-1 GHz Proprietary Protocol) connectivities to your lights and turns regular light bulbs into smart controlled lights. And the Smart Switch is an optional add-on that connects the Smart Relay and your wall switches for expanded functionality:
Whether the physical wall switch is on or off, the power is constantly on at the Smart Relay for it to remain always connected and online, thus you can always access and control your connected lights via apps or voice commands like Google Assistant, Alexa, Siri wirelessly.
No Neutral, No Problem
Unlike other home smart light switches, the In-Wall Relay Switch is a no neutral wire required smart light switch. Without requiring a neutral wire, a vast number of people around the world can enjoy the convenience of smart lights, without spending a fortune to rewire the electrical wires inside walls and ceilings.
Intuitive Voice Control
Enjoy the hands-free convenience of controlling lights at home with a voice. You could use your favorite voice assistants like Amazon Alexa, SmartThings, Google Assistant or Siri, based on the hubs you use. Wirelessly control all the lights in your home by your voice, for example, before going to bed, you only need to say "Good night, Alexa" instead of leaving your room to turn off the lights.
Works with All Types of Wall Switches
In-Wall Relay Switch works with three types of standard wall switches: momentary push buttons, toggle switches, and smart remote buttons. You can enjoy the convenience of smart lighting without the need of changing your original light wall switches and hereby avoid damaging the existing interior design style.
Support Any Lights Bulbs
Whether you are in Europe or in the United States, the In-Wall Relay Switch will most likely work with your voltage requirement and light fixtures. It supports input voltages between AC 85V-240V and different lights: incandescent, halogen, fluorescent, and LED lights.
Small Size Supports Multi-gang Switch
Divided into two parts, the Smart Switch part of the product is kept exceptionally small, as small as a coin. Two Smart Switches can fit in any electrical box to support up to a 4-gang switch panel so that you can also control various light fixtures from one multi-gang switch panel, one location.
Hardwired 4-Way Control with No Limit
In-Wall Relay Switch enables you to control your lights wirelessly and by using the traditional wall switches at the same time. Supporting hardwired 3-Way or 4-Way system, you can control same light fixture from multiple conventional wall switches.
Built-in Power Failure Memory
In-Wall Relay Switch memorizes the state of the light bulbs before a power outage and return it to the same state(on/off) prior to the power interruption when the power is restored.
EVVR In-Wall Relay Switch
Smart Relay Tech Specs
Model No.
Zigbee: SRB01;
Sub-1 GHz Proprietary Protocol: SRZW01
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Product Size(L*W*H)
59.4 * 39.3 * 21.2mm
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Input Voltage
AC 85V~245V
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Min. Load Power
No limit
Max. Load power
AC 110V/300W Resistive load
AC 220V/600W Resistive load
Operating Temperature
Operating: 0~40°C; Storage: -20~85℃;
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Ambient Humidity
5~85%
Wireless Connectivity
Zigbee 2.4GHz; Sub-1 GHz Proprietary Protocol 865.2MHz to 926.3MHz;
Wireless Profile
Zigbee 3.0; Sub-1 GHz Proprietary Protocol;
RF Characteristics
Zigbee: 2.4GHz
Range: 30m/indoor,
60m/outdoor;
Internal antenna
Sub-1 GHz Proprietary Protocol: 865.2MHz to 926.3MHz
Range: 30m/indoor,
60m/outdoor;
Internal antenna
Compatible load types
Incandescent bulbs;
Halogen bulbs;
Fluorescent lamps;
LED;
Smart Switch Tech Specs
Model Number
SS01
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Product Size(L*W*H)
33.5 * 28.2 * 17.3mm
Input Voltage
AC 85V~245V
Min. Load Power
No limit
Max. Load power
AC 110V/300W
AC 220V/600W
Temperature
Operating：0~40°C; Storage：-20~85℃;
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Ambient Humidity
5~85%RH
Supported Switch Type
Toggle, Momentary;
Supported Loads
Incandescent/halogen
Minimum Load Power: No Limit
Maximum Load Power: AC110V 300W / AC220V 600W
LED
Minimum Load Power: No Limit
Maximum Load Power: 600W/220V
300W/110V
Fluorescent
Minimum Load Power: No Limit
Maximum Load Power: 600W/220V
300W/110V
Note: The switch is an optional part of the wireless relay, and the maximum load power of the wireless relay is lower when connected with the switch
FAQs
Don’t see your question answered below? Contact us today.
What is the difference between a wall switch and a wireless switch?
The wall switch is a common electrical device that enables people to have control over the electrical current of a circuit. Wall switches make it possible to turn the lights or other appliances on and off, by pressing the physical wall switches or remote control.
A wireless switch uses wireless compatibility to power light fixtures throughout your home. There are more wireless smart switches that can be controlled by APP, smartphone, smart home hub, smart button and more. This eliminates many safety concerns that often come with wall switches, and also makes for a more convenient experience by controlling the lights from the palm of your hand. To install smart wireless switches in a house that doesn’t have a neutral wire, we should either implement a rewiring, or a no-neutral wire-designed smart wireless switch is required.
What are the benefits of a smart switch?
Creating a more digitally inclined living space comes with many benefits. Some of the advantages include:
1.Security. Controlling the lights from anywhere at any time, even when you’re away from home, can provide a sense of safety and security.
2.Saved money. With an eco- and energy-efficient mindset, you can save money with the smart switch by programming when the lights go on and off.
3.Convenience. Don’t leave your bed to get up and turn off the lights. Enjoy the convenience of controlling your lighting with your smart device instead.
Can you wire a smart switch without neutral wire?
Yes! There’s no reason to rewire the electrical wires in your walls when you want to turn your living space into a smart home. A no-neutral wire-required wireless switch takes functionality to the next level by eliminating the need for wiring without compromising on the performance.
What’s the difference between EVVR In-Wall Relay Switch and other no-neutral wire smart switches?
Compared to other no-neutral wire smart switches, EVVR In-Wall Relay Switch is designed without many common limitations:
1. Exceptionally small: With its unique split design, the Smart Switch part of the In-Wall Relay Switch is kept exceptionally small. 2 switches can fit in any electrical boxes to support up to 4-gang panel switches.
2. No neutral wire required: Choosing a no neutral wire required smart light switch, you can automate your light even you don't have a neutral wire installed in your house. Hence a lot of money and time rewiring walls can be saved. In-Wall Relay Switch is such a no neutral wire required smart light switch product.
3. No minimum load requirement: Unlike other no-neutral wire smart light switches, the In-Wall Relay Switch doesn’t have a minimum workload requirement, which eliminates light flickering and electrical leakage problems that might happen when it works with LED light bulbs.
4. Support wide-range switch panels: In-Wall Relay Switch supports three types of light switch panels: momentary push buttons, toggle push buttons, and smart remote buttons.
5.Support different type of light bulbs: In-Wall Relay Switch supports input voltages between AC 85V-240V and different lights: incandescent, halogen, fluorescent, and LED lights.
How to install In-Wall Relay Switch? Guide of installation In-Wall Relay Switch
>> How to install In-Wall Relay Switch
>> How to install In-Wall Relay Switch for 3 way switch
If you would like to view installation videos, please visit and subscribe to our YouTube channel
What is the difference between a wall switch and a wireless switch?
The wall switch is a common electrical device that enables people to have control over the electrical current of a circuit. Wall switches make it possible to turn the lights or other appliances on and off, by pressing the physical wall switches or remote control.
A wireless switch uses wireless compatibility to power light fixtures throughout your home. There are more wireless smart switches that can be controlled by APP, smartphone, smart home hub, smart button and more. This eliminates many safety concerns that often come with wall switches, and also makes for a more convenient experience by controlling the lights from the palm of your hand. To install smart wireless switches in a house that doesn’t have a neutral wire, we should either implement a rewiring, or a no-neutral wire-designed smart wireless switch is required.
A wireless switch uses wireless compatibility to power light fixtures throughout your home. There are more wireless smart switches that can be controlled by APP, smartphone, smart home hub, smart button and more. This eliminates many safety concerns that often come with wall switches, and also makes for a more convenient experience by controlling the lights from the palm of your hand. To install smart wireless switches in a house that doesn’t have a neutral wire, we should either implement a rewiring, or a no-neutral wire-designed smart wireless switch is required.
What are the benefits of a smart switch?
Creating a more digitally inclined living space comes with many benefits. Some of the advantages include:
1.Security. Controlling the lights from anywhere at any time, even when you’re away from home, can provide a sense of safety and security.
2.Saved money. With an eco- and energy-efficient mindset, you can save money with the smart switch by programming when the lights go on and off.
3.Convenience. Don’t leave your bed to get up and turn off the lights. Enjoy the convenience of controlling your lighting with your smart device instead.
1.Security. Controlling the lights from anywhere at any time, even when you’re away from home, can provide a sense of safety and security.
2.Saved money. With an eco- and energy-efficient mindset, you can save money with the smart switch by programming when the lights go on and off.
3.Convenience. Don’t leave your bed to get up and turn off the lights. Enjoy the convenience of controlling your lighting with your smart device instead.
Can you wire a smart switch without neutral wire?
Yes! There’s no reason to rewire the electrical wires in your walls when you want to turn your living space into a smart home. A no-neutral wire-required wireless switch takes functionality to the next level by eliminating the need for wiring without compromising on the performance.
What’s the difference between EVVR In-Wall Relay Switch and other no-neutral wire smart switches?
Compared to other no-neutral wire smart switches, EVVR In-Wall Relay Switch is designed without many common limitations:
1. Exceptionally small: With its unique split design, the Smart Switch part of the In-Wall Relay Switch is kept exceptionally small. 2 switches can fit in any electrical boxes to support up to 4-gang panel switches.
2. No neutral wire required: Choosing a no neutral wire required smart light switch, you can automate your light even you don't have a neutral wire installed in your house. Hence a lot of money and time rewiring walls can be saved. In-Wall Relay Switch is such a no neutral wire required smart light switch product.
3. No minimum load requirement: Unlike other no-neutral wire smart light switches, the In-Wall Relay Switch doesn’t have a minimum workload requirement, which eliminates light flickering and electrical leakage problems that might happen when it works with LED light bulbs.
4. Support wide-range switch panels: In-Wall Relay Switch supports three types of light switch panels: momentary push buttons, toggle push buttons, and smart remote buttons.
5.Support different type of light bulbs: In-Wall Relay Switch supports input voltages between AC 85V-240V and different lights: incandescent, halogen, fluorescent, and LED lights.
1. Exceptionally small: With its unique split design, the Smart Switch part of the In-Wall Relay Switch is kept exceptionally small. 2 switches can fit in any electrical boxes to support up to 4-gang panel switches.
2. No neutral wire required: Choosing a no neutral wire required smart light switch, you can automate your light even you don't have a neutral wire installed in your house. Hence a lot of money and time rewiring walls can be saved. In-Wall Relay Switch is such a no neutral wire required smart light switch product.
3. No minimum load requirement: Unlike other no-neutral wire smart light switches, the In-Wall Relay Switch doesn’t have a minimum workload requirement, which eliminates light flickering and electrical leakage problems that might happen when it works with LED light bulbs.
4. Support wide-range switch panels: In-Wall Relay Switch supports three types of light switch panels: momentary push buttons, toggle push buttons, and smart remote buttons.
5.Support different type of light bulbs: In-Wall Relay Switch supports input voltages between AC 85V-240V and different lights: incandescent, halogen, fluorescent, and LED lights.
How to install In-Wall Relay Switch? Guide of installation In-Wall Relay Switch
>> How to install In-Wall Relay Switch
>> How to install In-Wall Relay Switch for 3 way switch
If you would like to view installation videos, please visit and subscribe to our YouTube channel
High Compatibility
In-Wall Relay Switch is compatible with Apple HomeKit, standard Zigbee 3.0, Sub-1 GHz Proprietary Protocol. You can connect it directly with your HomePod, HomePod mini, Apple TV or iPad, which serve as home hubs or integrate it with your favorite smart home hubs, including SmartThings, Amazon Echo, Aeotec, SONOFF, eWelink, and other third-party hubs.
*For In-Wall Relay Switch(HomeKit/Wi-Fi) version please visit the product detail page of HomeKit enabled In-Wall Relay Switch
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