Features: Replace your traditional switch to make it for smart.Use the physics button or APP to control your home device. Can make your exist 2 way switch for smart also,just install 1 DIY for smart switch,Wirelessly control your lights or devices by voice or automation using your for Smart Phone and Alexa or -Google Assistants. Remote control lightings or appliances of your house via for Smart Life app from anywhere at any for time. Hub required. Create schedules to automatically turn the home appliances or lightings on/off. Helping you saving energy and electric fee. Easy DIY Installation:Simply hide it into wire box with its mini design and wire it to your traditional reset switch for normal use;Add the device to Tuya ZigBee hub to start intelligent controls in for Smart Life App. Specifications: Material:ABS Size:Approx.4.8x5x1.7cm/1.88x1.96x0.66inches Color:White Rated voltage: 110V- 240V/AC Rated current: 300W/channel Startup method: power on Type;Zigbee version/wifi version Wireless protocol:Zigbee 3.0 Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings. Package includes: 1x for Smart Light Switch