Feature:1. Suitable for exhibition security checkpoints, examination room security checkpoints, metro station security checkpoints, airport security checkpoints, station security checkpoints.2. Built‑in core electromagnetic compatibility technology to enhance anti‑interference ability, the central processing unit directly calculates the sampling signal of prohibited items.3. Adjustable sensitive detection technology, battery under-voltage indication (LED light is always on). It can detect a metal object the size of a pin (or even smaller).4. The lightweight design and comfortable handle grip make it easy to use for long periods of time.5. High‑quality ABS material, anti‑falling, shock‑resistant and durable, which has longer service life.How to Use:1. Open the battery compartment after getting the product.2. Follow the instructions to install the appropriate battery and install the battery compartment cover.3. Long press the "on/off button" to start the detection.Specification:Item Type: Metal DetectorMaterial: ABSColor: As shown in the pictureModel: MD-300Power Supply: 6F22 9Vx1 (not included)Application: Metal detectionRated Voltage: DC 9VPower: 300mWWorking Frequency: 22KHzWorking Environment Temperature: 0℃~40℃Alarm Mode: Sound and vibration (can be converted according to needs) Package List:1 x Metal Detector(Battery Not Included)1 x Instruction ManualNote:1. Don't forget to turn off the power after use.2. The battery should be removed if it is not used for a long time.