Description:Modern micro chip adopted which makes it alarm on time, high accuracy and reliability, flexible volume and easy installation .Specification:1.Shutter triggered motivation: ≥1.5cm.2.Dry battery model NO.: 23A. 12V. 3.Working condition: Indoor, temperature -10~-50oC, relative humidity < 95%.4.Power consumption: Standby 0.01 W, alarm 0.09 W.5.Weight: 60g excluding battery.