Features: 1. Self-powered wireless switch: No cable, no battery, easy installation, environmental protection, and no pollution. 2. Safe and waterproof, it can be installed directly in the bathroom, and wet hands can touch the remote-controlled lamps and heaters. No need to worry about electric shock, moisture, or battery oxide, etc. 3. Quickly convert existing switch positions, creating a switch anywhere or as a portable remote control, remote control night light, etc., very convenient and compatible with any lamp, including halogen, incandescent, CFL, fluorescent, and LED. 4. The maximum operating distance of the wireless remote control is 200 meters, 50 meters (indoors), but walls and obstacles will affect the distance. Before installation, we recommend testing the receiver distance first. Controller Parameters Receiver: Control Distance: 50-200 m Operating Frequency: 433.92 MHz Operating Voltage: 110-250V 50/60Hz Maximum Current: 10 A Two-Way Control: Supported Size: 49*48*23 mm Self-Defense Controller: 1. Working Mode: On/Off 2. Power Mode: Self-Generating Kinetic Energy 3. Working Frequency: 433.92 MHz 4. Number of Buttons: 1 Key 5. Switch Times: More than 200,000 Times 6. Product Size: L86*W86*16.5 mm 7. Launch Distance: 200 m (Outdoor), 50 m (Indoor) Package List: 2 * Receivers 1 * Self-Powered Dual Controller 1 * Double-Sided Sticker 1 * User Manual