Voltage: AC 80~275V How Wireless Switch Works ？ 1.Switch: Self-powered RF transmitter, Place anywhere in your house 2.Receiver: Accept transmitter (switch) signal to switch power on/off to light. (linked between power and lamp) 3.Click switch(transmitter) sends wireless signal to receiver to accomplish power on/off control Features : 【DIY Your Switch System】One receiver can be paired with up to 8 switches. 【Strong Wireless Signal】Up to 1640ft (500m) wireless range in open area, 130ft (40m) wireless range indoor with obstacles. 【IP66 Waterproof】Works great in wet environments like bathroom 【LED Indicator】Blue LED indicator shows you the working status of the switch 【High Compatibility】also compatible with the traditional wired switch.No need to rebuild your switch system.