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Smart Wifi Touch Switch No Neutral Wire Required Smart Home 1/2/3 Gang Light Switch 100~250V Support Alexa Google Home Tuya App 433RF Remote New Version 1. Upgraded SCR to relay, which has better heat resistance and safety. Also, it works with 100~250V. 2. Upgraded capacitors, which is stronger and more stable. Main feature 433MHz RF remote control This smart switch can be used with 433mhz RF transmitter. Control range: ≤ 15M. App control as long as your smartphone or tablet has a 4G or WIFI network, you can control lights by the App "Tuya Smart or Smart Life". Voice control is perfectly compatible with Alexa and work with Google Home. Turn lights on/off with voice commands when your hands are full. Setting a schedule Setting a schedule or timer on/off your lights on at night and in the morning, and then your will never return to a dark house when you come home at dusk. Moreover, you can quietly wake up until scheduled light on every morning. Sharing & Group Control Share devices with your family to eliminate extra steps for connection.