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

Model: ZA300 Weight:250g Size:360(L)*82(W)*42.5(H)mm Package size:370 *100 * 50 mm Package weight:0.5kg Sensitivity Level:Low sensitivity, low sensitivity , high sensitivity and ultra-high sensitivity (can detect single staple) Alarm mode:Vibration , sound , vibration and sound three alarm mode , the operator can judge size of the metal by the sound light . Power supply:two pcs battery 5#, (rechargeable battery is optional) Working time:More than 80 hours Operating temperature:-25℃--60℃ Material:Shock-resistant and impact-resistant ABS plastic.

Model: ZA-360 Size: 410(L)*85(W)*45(H)mm Weight: 500g Operating temperature: -25℃--60℃ Service time : over 100 hours Power supply: two pcs battery 5# Sensitivity Level : Low sensitivity, low sensitivity , and high sensitivity and ultra-high sensitivity (can detect single staple) Alarm mode: Vibration , sound , vibration and sound three alarm mode , the operator can judge size of the metal by the sound light .