Mengshen Wireless Home Door Window Burglar Alarm DIY Safety Security Alarm System Magnetic Sensor with Remote Control – 2 Alarm 1 Remote Control M642

Specifications: Host battery: 2*AAA alkaline batteries(included) Remote Control battery: 12V/27A alkaline battery(included) Item Size: 8.5*4.2*1.4cm/3.3*1.7*0.6in Item Weight: 37g/1.3oz Package Information: Package Size: Approx. 10.3*5.9*3.5cm/4.1*2.32*1.4in Package Weight: Approx. 68g/2.38oz Package