eWelink Zigbee Smart Door Window Sensor Home Security Alarm Detector for Alexa
Required ewelink Zigbee HUB. ●Alarm current: ≤15mA. Smart linkage, tool-free installation. 1 sensor,1 manual,1 sticky. Very low power consumption and long battery life. ●Battery type and model: 2 LR03AAA dry batteries (600mA).