Specification:Item Type: Metal Detector Material: PP Color: As shown in the picture Unfold Length: Approx.40cm/15.7in Application: Handheld folding metal detector Detection Sensitivity: Φ 2.5mm/0.1in steel ball Alarm Mode: Sound and light synchronous alarm Battery: 9V 6F22ND battery (Not included) Power Consumption: 220mW Working Current: Less than 5mA-8mA Working Temperature: -10℃- +50℃ Weight: Approx.233g/8.2oz Package List:1 x Metal Detector(Battery Not Included)1 x Instruction Manual Note:1. Please allow 1?2cm error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. Features Sensitivity is easy to detect a metal object of size (or even smaller). Sensitivity can be adjusted according to site requirements. Simple operation, exquisite design, easy storage and low failure rate. Handheld and light weight,easy to use. There is a battery undervoltage indication (the LED light is always on). The alarm mode has two alarms: sound and light, vibration, high sensitivity. It can be used for public security in airports, railway stations, docks, customs and frontier defense as well as quality control of medicine, food and other commodities.