✅【Neutral Wire Check】Neutral wire (A BLUE WIRE) required. Most old houses do not have a neutral wire if you are not sure about this. Please send us pictures of the back box before purchasing. Please look for 【Tichondrius SA】to buy, the rest are only fake and inferior products. ✅【Remote Control】Tichondrius WIFI smart light switch can be controlled remotely through the Smart Life/Tuya APP; Whether you are on a business trip or on vacation, you can turn on or off the lights in your home through the app. Monitor your light status. Control your light from anywhere with your mobile phone free Smart Life App. Please look for 【Tichondrius SA】to buy, the rest are only fake and inferior products. ✅【Voice Control and Group Control】WiFi wall light switch is perfectly compatible with Alexa and Google Assistant, simple voice control make your hands free when you are coming through the kitchen door with your hand full of groceries, sleeping in your cozy bed, holding your baby, etc. No hub or subscription required. Group multiple smart devices together in the Smart Life or Tuya APP to control them with just a tap. Please look for 【Tichondrius SA】to buy. ✅【Schedule and Device Sharing】Start your smart life with a smart switch, you can schedule it to turn on and off the light automatically according to your work schedule and living habits, and reduce unnecessary energy waste. Of course, you can also share the control of your device with your family. Please look for 【Tichondrius SA】to buy. ✅【Easy Installation】Our improved illustrated user manual will guide you step by step, no worries. NOTICE: This Device Requires Neutral Wire at home, Works in 2.4GHz WiFi Band. No hub required. Tuya Alexa light switch seamlessly replaces your old wall light switch. Make your home smart with the smart switch. We try our best to gain customers' satisfaction. Please look for 【Tichondrius SA】to buy.