CRX Hand-Held Metal Detector Using to detect the metal parts as guns, Knifes, etc... And used by security guards in the Checkpoints to make sure of the entrance. hand held metal detector include functions as followed: Earphone jack, Re-charge jack, Vibration, Alert & LED indication hand held security body scanner is a CE passed hand held metal detector designed to meet the exact requirements of the security industry. Typical uses will include body search for offensive weapons in crowd control, airport and border security, checking parcels and letters for metal objects and anywhere that hidden metal needs to be detected... The presence of metal will be indicated by an audio warning tone and a red light coming on. The sensitivity is adjustable. Red LED light indicates the detection of metal Momentary push button temporarily eliminates detection of nearby ambient metal such as rebar, metal walls, etc. Green LED light indicates ON; Amber LED indicates low battery; Red LED indicates Alarm.