HIGH SENSITIVITY: HEYOURTOR metal detector can detect even small hidden metal objects. Detects concealed weapon, knives and other metal objects in baggages. Adjustable sensitivity depends on object size and the detect distance 2 KINDS OF ALERTS: The metal detector wand lets you choose between sound and vibration detection alerts. Depends on the needs, vibration function should be used in noisy situation or in places where the operator does not wish for the sound to be heard in his surrounding area ADJUSTABLE SENSITIVITY: Press the low sensitivity switch during detection, detector will only respond to bigger metal objects such as knife, hand gun etc and will not respond to small metals such as ring, key, coin, pin etc. Do not release the low sensitivity switch until you complete low sensitivity detection BATTERY OPERATED: Operates on 9V standard (Two batteries included in the package) or rechargeable battery (Not included). With battery depletion warning: automatic continuous sound or vibration alert COMFORTABLE HANDLE & WIDELY USE: Portable metal detector wand, lightweight design and comfortable handle grip make it easy for long time use. With a belt clip, make it easy and convenient to use. Good for security, indoor and outdoor events, such as airport, schools, train station, subway, sports events, exhibition center, anywhere you need metal detection