Specification: Product model: DJT11LM Product size: 36x36x 9mm (1.42x 1.42x 0.35in.) Wireless connection: Zigbee Battery model: CR2032 Executive standard: Q/QLML012-2016 Working temperature: -10° C~+50° C Working temperature: 0~95% RH, no condensation Material: PVC fireproof material