Easily control other smart home accessories with three actions, Zigbee, 2 Years Battery Life, Along with the Aqara Hub, it serves as a doorbell when attached to the wall. Ringtones can be customized to your preference, can be used through HomeKit with the Aqara Hub. Aqara Wireless Mini Switch is a remote control switch with compact design and low energy consumption. Supports up to 50,000 times of physically on/off switching. Adopts V-0 grade flame-retardant PC shell and high temperature resistance.Dimensions: 45 × 45 × 12 mm Battery: CR2032