1. Superb Mobility Compared with Wall Switches 2. More Convenience Than Apps 3. Full Control at Your Fingertips 4. 5-Button Simple Control 5. 12-month Long Standby Time(40 Operations per Day) 6. Compatible with Yeelight Ceiling Lights Series Temperature: -10-40°C Operating Humidity: 0%-85%RH Battery Model: CR2032