Sensitivity is easy to detect a metal object of size (or even smaller). Sensitivity can be adapted to the requirements of the location. Simple operation, beautiful design, easy storage and low failure rate. Handheld and lightweight, easy to use. There is an indication of battery undervoltage (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, stations, docks, customs and border defense, as well as quality control of medicine, food and other goods. Specification: Condition: 100% New Item Type: Metal detector Material: PP Color: As shown in the image Expand Length: approx. 40cm/15.7in Application: Handheld Foldable 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 Operating Current: Less than 5mA-8mA Working Temperature: -10- +50 Weight: Approximately. 233g/8.2oz Package List:1 x Metal Detector (battery not included) 1 x Manual Note:1. Please note an error margin of 1-2 cm due to manual measurement. Thank you for understanding.2. Monitors are not calibrated the same, item color displayed in photos may differ slightly from the real object. Take the real standard.