1. Introduction
The Milfra Tuya Zigbee Smart Wall Switch is designed to provide intelligent control over your home lighting. This smart switch integrates with Zigbee networks and the Tuya Smart Life app, allowing for remote control, voice commands via Google Assistant and Amazon Alexa, scheduling, and scene pattern settings. It supports both neutral wire and no-neutral wire installations, offering flexibility for various home electrical setups.

Product overview highlighting smart features and wiring options.
2. Product Features
- Flexible Wiring: Supports both neutral wire and no-neutral wire installations (AC100-240V).
- No Capacitor Required: Enhanced stability without the need for an external capacitor.
- Voice Control: Compatible with Amazon Alexa and Google Home for hands-free operation.
- Mobile APP Remote Control: Control your lights from anywhere using the free Tuya or Smart Life app.
- Timing & Scheduling: Set custom schedules and timers for automatic light control.
- Status Feedback: Monitor the real-time status of your lights through the app.
- Overload Protection: Built-in safety mechanism to prevent damage from electrical overloads.
- Physical Button: Features a large, tactile physical button for manual control.
- LED Indicator: Integrated LED light for easy navigation in the dark.
- Scene Pattern Setting: Create and activate custom lighting scenes with a single tap in the app.
- Family Sharing: Easily share control of the device with family members.
3. Specifications
| Attribute | Value |
|---|---|
| Type | Smart Wall Light Switch |
| Model | KS-811 |
| Communication Method | Zigbee |
| Power Supply Mode | Neutral Wire Optional |
| Rated Current | 10A (Max) |
| Rated Voltage | AC100-240V~, 50/60Hz |
| Load Power (LED Lamp) | Max 150W |
| Load Power (INC Lamp) | Max 600W |
| Wireless Frequency | 2.4GHz |
| Wireless Standard | IEEE802.11b/g/n (Note: This refers to the standard for the Zigbee hub's connection to your home network, not the switch's direct connection.) |
| Product Size | 116mm x 75mm x 35mm |

Detailed product dimensions.
4. Package Contents
Please check the package contents upon receipt. If any items are missing or damaged, contact your retailer.
- Milfra Tuya Zigbee Smart Wall Switch (1, 2, or 3 Gang, depending on model purchased)
- Mounting Screws
- User Manual
5. Safety Information
WARNING: Risk of Electric Shock. Improper installation can be dangerous or illegal. Consult a qualified electrician if you are unfamiliar with electrical wiring.
- Always turn off power at the circuit breaker before installing or servicing the switch.
- Ensure the switch is installed in a standard wall box.
- Do not exceed the maximum load ratings for LED (150W) or Incandescent (600W) lamps.
- This device is for indoor use only.
- Keep out of reach of children.
6. Setup and Installation
6.1 Wiring Instructions
The Milfra Smart Wall Switch supports two wiring methods: with a neutral wire or without a neutral wire. Please identify your home's wiring configuration before proceeding.
- Turn off Power: Locate your circuit breaker and turn off the power to the switch you are replacing. Verify power is off with a voltage tester.
- Remove Old Switch: Carefully remove the old switch from the wall box.
- Identify Wires: Identify the Live wire (Line), Load wire(s), Neutral wire (if present), and Ground wire.
- Connect the Smart Switch: Follow the appropriate wiring diagram below for your installation type.
6.1.1 Neutral + Live Wire Version
If your electrical box has a neutral wire, follow this diagram:

Wiring diagram for installations with a neutral wire.
6.1.2 Single Live Wire Version (No Neutral Required)
If your electrical box does not have a neutral wire, follow this diagram. This switch does not require a capacitor for no-neutral setups.

Wiring diagram for installations without a neutral wire.

Confirmation that no capacitor is required for either wiring method.
Attention: If there is no neutral wire in your house, please ignore the 'N' position for wiring. If there is a neutral wire, just use it normally.
- Secure the Switch: Once wired, gently push the switch into the wall box and secure it with the provided screws. Attach the faceplate.
- Restore Power: Turn the power back on at the circuit breaker.
6.2 Zigbee Hub Connection
This smart switch requires a Zigbee hub (gateway) to function with the Tuya/Smart Life app and voice assistants. Ensure your Zigbee hub is set up and connected to your home WiFi network.

System architecture showing the role of the Zigbee hub.
6.3 App Pairing
- Download App: Download the 'Tuya Smart' or 'Smart Life' app from your smartphone's app store (iOS/Android).
- Register/Login: Create an account or log in to your existing account.
- Add Device: In the app, tap '+' or 'Add Device'. Select 'Switch (Zigbee)' or similar category.
- Enter Pairing Mode: Follow the app's instructions to put the switch into pairing mode. This usually involves pressing and holding one of the switch buttons for a few seconds until an indicator light blinks.
- Confirm Pairing: The app will detect and add the switch. Rename the switch for easy identification (e.g., 'Living Room Light').
7. Operation
7.1 Physical Button Control
Each gang on the switch has a physical button. Press the button to manually turn the connected light ON or OFF. An indicator light will show the status.

Physical buttons and indicator lights on the switch.
7.2 APP Remote Control
Once paired with the Tuya/Smart Life app, you can control your lights from anywhere with an internet connection.
- Open the app and select your switch.
- Tap the virtual buttons to turn lights ON or OFF.

Remote control via the mobile application.
7.3 Voice Control
Integrate your switch with Amazon Alexa or Google Home for voice commands.
- Link Account: In the Alexa or Google Home app, link your Tuya Smart/Smart Life account.
- Discover Devices: Ask Alexa/Google to discover new devices.
- Voice Commands: Use commands like "Alexa, turn on the living room light" or "Hey Google, turn off the bedroom light."

Voice control integration with smart assistants.
7.4 Scheduling and Timers
Set up custom schedules to automate your lighting.
- In the Tuya/Smart Life app, select your switch.
- Go to the 'Schedule' or 'Timer' section.
- Set specific times for lights to turn ON or OFF, and choose repeat days.

Setting custom schedules for automated lighting.
7.5 Scene Patterns
Create personalized scenes to control multiple devices or set specific moods.
- In the Tuya/Smart Life app, navigate to 'Smart' or 'Scenes'.
- Create a new scene and add your smart switch, along with other smart devices.
- Define actions (e.g., 'Home Mode' turns on specific lights, 'Sleep Pattern' turns off all lights).

One-key setting for various scene patterns.
7.6 Family Sharing
Allow other family members to control the smart switch.
- In the Tuya/Smart Life app, go to 'Me' > 'Home Management'.
- Add family members and grant them control permissions for your devices.

Sharing device control with family members.
8. Maintenance
- Cleaning: Wipe the switch surface with a soft, dry cloth. Do not use harsh chemicals or abrasive cleaners.
- Firmware Updates: Periodically check the Tuya/Smart Life app for available firmware updates to ensure optimal performance and security.
- Environmental Conditions: Ensure the switch is not exposed to extreme temperatures or humidity.
9. Troubleshooting
| Problem | Possible Solution |
|---|---|
| Switch not responding to app/voice commands. |
|
| Lights flicker or do not turn off completely. |
|
| Cannot pair the switch with the app. |
|
| Voice control not working. |
|
10. User Tips
- Stable Zigbee Network: For optimal performance, ensure your Zigbee hub is centrally located and has a strong, stable connection to all your Zigbee devices.
- Label Wires: Before disconnecting any wires during installation, use electrical tape and a marker to label each wire (Live, Load, Neutral, Ground) to avoid confusion.
- Test Before Finalizing: After wiring but before securing the switch completely, temporarily restore power to test if the switch powers on and responds to physical presses.
- Group Control: Utilize the app's grouping feature to control multiple switches or lights simultaneously, even if they are different types.
- Automate with Scenes: Leverage scene patterns for daily routines, such as a 'Good Morning' scene that gradually brightens lights or an 'Away' scene that turns off all lights and activates security features.
11. Warranty and Support
Milfra products are designed for reliability and performance. For warranty information, technical support, or assistance with your smart switch, please contact your original retailer or the manufacturer's customer service. Keep your purchase receipt as proof of purchase.



