1.mechanical keys: feel more good, more easy to control and stronger stability. 2.Application support: IOS&Android system, app(smart life or TUYA). 3.Constant monitoring real-time device status provide on the app. 4.Round appearance design:beautiful and unique ,beautiful lines, does not change colour, easy to clean, always looks like new. And It’s made of PC and ABS Vo grade flame-retardant and fire-proof housing,safe, strengthen the protection of power line short circuit. 5.Suitable for ordinary lamp, incandescent lamp, fluorescent lamp, led lamp, etc.