Multi-function Each key supports two key events click and long press. Each trigger can be bound to a different set of operations Intelligent linkage The wireless double key switch can link the intelligent appliances at home to enabledisable the intelligent appliances at home with one key High precision connection Wireless double key connection has high precision and wide range Ultra-low power Wireless dual-key switch has low power consumption and long battery life Easy installation Wireless double key switch can be attached to the wall or can be directly held for use Specifications Operating temperature 5-60 Operating humidity 20RH-80RH Wireless protocol 2.4GHz Wi-Fi Zigbee 3.0 Operating voltage DC 3V Battery type 2AAA batteries not included Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.