Ultra sensitive response to metal objects. Accurate detection of all ferrous, non-ferrous and stainless steel weapons, contraband and other metallic objects. Does not require adjustments. Silent vibrating with red LED alarm indicator. Sealed waterproof construction with Ballistic weave holster included. Warranty: 24 month manufacturer warranty for parts and labour only.360 degree operation Tuning: Automatic Battery: single 9 volt battery provides up to 80 hours of normal operation. Dimensions: Length 22cm; Thickness 4.1cm: Scan area 8.9cm; Weight .2 kilograms