Voltage range: 90-260v ac(50/60hz); max current: 2a; operating current: 1a; max wattage: 200 watts. slampher is a wifi wireless light holder that can connect to various light bulbs with e27 screw base. slampher sends data to cloud platform through wifi router, which enables you to remotely control all light bulbs with the app ewelink on your smart phone. the server of slampher is amazon aws global server. slampher make all lights smart, as long as your phone has network you can remotely turn on or turn off your lights from anywhere at any time. and by setting timing schedules for your lights, you can maintain a carefree life. note: this slampher has 433mhz rf remote function; the app ewelink enables you to control your devices easily. you can download the ios version in app store and the android version in google play.