Door/Window Sensor (MCT-340 E)
https://csa-iot.org/csa_product/door-window-sensor-mct-340-e/
…message will be sent to the receiver 30 days before expiration of battery life Specifications: WIRELESS Supported Network: ZigBee Home Automation 1.2 Frequency: 2.4 GHz as per IEEE 802.15.4 Tamper…