**Product Specifications:**
**Brand:** Aqara
**App Compatibility:** Aqara Home, Apple Home, Mi Home
**Usage Notes:**
- This product requires a gateway for operation.
- The device does not support simultaneous connection to Apple Home and Mi Home.
- There are 4 versions of this product, with the four-key version consisting of 3 wall switches and 1 wireless switch at the bottom.
**Features:**
- Elegant design with piano key-like buttons for a pleasant touch interaction.
- Supports voice control with Siri, Xiao Ai, and other voice assistants.
- Customizable key synchronization for convenient dual control.
- Remote wireless control with the combination of wall switches, wireless switches, and gateways.
- Multiple safety features including over-temperature and overload protection.
- Compatibility with a wide range of smart lights.
**Performance:**
- Zigbee 3.0 technology for stable connectivity and low power consumption.
- Real-time power consumption monitoring for energy efficiency.
- Mars-Tech technology for seamless synchronization between smart lights and switches.
**Design:**
- Available in single, double, triple, and quadruple key versions.
- Dimensions: 86*86*33.5mm
- Rated for Zigbee, 220V~50Hz, with load capacities for various types of lights.
**Installation and Connectivity:**
- Supports both single-fire and zero-fire environments.
- Easy installation and reset procedures for network connection.
- Maximum communication distance between the switch and gateway is 7-10 meters.
**Common Questions:**
- Provides guidance on installation, resetting, power requirements for lights, and multi-control functionality.
**Safety and Reliability:**
- Built-in safety features such as over-temperature protection, overload protection, and surge protection.
- Long-lasting design with gold-plated terminals and durable construction.
**Product Versions:**
- ZNQBKG38LM, ZNQBKG39LM, ZNQBKG40LM, ZNQBKG41LM
**Warranty:** Contact customer service for more information.
For any further inquiries or technical support, please refer to the user manual or contact Aqara customer service.