The MD-3003B1 Hand Held Metal Detector (explosive detector) is a powerful easy-grip, hand-held, security screener.  With it's 360 degree scanning provides uniform sensitivity along the scan area including tip pinpointing.  Choice of audible or silent Vibrate / LED Alarm, for less conspicuous detecting.   The GP3003B1 Hand Held Metal Detector is used by security personnel and law enforcement agents numerous times daily, all over the world. 1. Simple to use, with a holster for easy carrying. 2. It is commonly known as "Flat-plate" metal detector, large scanning area. 3. Battery Re-charging function: the choice of direct battery charge and cradle battery charge. 4. When the voltage becomes low, the LED light does not light up, but alarm with beep sound. 5. Dual alarm with sound & light and vibration. 6. In the specific needs of occasions can switch to the automatic reset function in order to achieve a pass small items. 7. Sensitivity: Users can adjust the level of sensitivity. 8.Power supply: 6F22ND 9V battery (alkaline battery, rechargeable battery) 9.Alarm mode: sound (shock) and light alarm simultaneously Dimensions: Length 45cmX38cmX26cm Product Weight: 25 pcs / carton, 13 kg / box.