Description : BORUI GP-101 Handheld Security Alarm and Vibration Metal Detector Alarm mode : sound and light alarm and vibration alarm Detect metal Size : All contraband metal objects Measuring range: mobile phones, knives, cheating tool, contraband metal Type : Metal Detector Model : GP-101 Scope : station, subway, schools, factories for metal security sites Power supply: standard 9v alkaline battery stack Working environment: -5 to + 55 centigrade High sensitivity, can detect ferrous and non-ferrous metals, simple to use, convenient and easy to adjust. Package included : 1 x GP-101 security metal detector Details pictures by BG :