No Battery,No Wiring & No WiFi Required- Innovative kinetic energy technology to produce electricity,switch can be installed wherever without running additional wires; No need to connect Wi-Fi & tear walls; save material cost & engineer labour fee! Eco-Friendly. Secure Wireless Signal - Encrypted wireless signal can go through walls without interference problems,unique communication code between switch and receiver; 30M indoor using,outdoor up to 160M transmission distance. Designed to fit seamlessly into any decor - the wall switch and receiver are self-powered and can be used with any light; halogen,incandescent,CFL bulbs,fluorescent tubes,LED lighting,etc. Small size receiver(connect to lights or other loads) fits limited space,such as electrical junction box,lights canopy,recessed box,existing switch box,hidden in ceiling or surface mounting,etc. Safety & Easy to Install - No power needed,no complex facility,no complicated setup,only two easy steps for installation & pairing! Anyone can do it with some basic experience in wiring. Durable & Flexible Coding - Using encrypted wireless signal protocols & passed a 200,000 times endurance test,20 years lifetime. You can have a switch control multiple lights or multiple switches control a light,like 1-2 way,3-way,multi-ways switch. Switch Technical Parameters: Power Supply: Micro energy acquisition and self-generating power Operating Frequency: 433MHz Control Distance:160m (outdoor),30m (indoor) Control Method: Pairing with our wireless receiver Waterproof: IP56 for Switches Number of Gangs (Keys):1 Usage On/Off Times: 200,000 Dimensions: L85mm x W85mm x H15mm Weight: 86g