Model: MD3003B1 Size: 410(L)*80(W)*420(H)mm Weight: 400g Operating current:< 50mA; Operating temperature:-5℃to +55℃ Power: 9V (6F22) alkaline battery operate voltage: 7V-9V Alarm: video LED & audio/ video LED & vibration Sensitivity level: detect pistol at 90mm, six inches knife at 60mm, razor blade at 30mm, pin at 10mm Packing: 25pcs/ctn