Features: 1. Fast Response: Built-in induction coil, within the standard detection range, immediately alarm and vibrate prompt when metal substances are detected. 2. Dual Alarm Mode: The operation method is simple and easy to use, ready for a variety of occasions, built-in sound and vibration dual alarm, with high-brightness LED light. 3. IP66 Waterproof: Can work in harsh environments with water, can find underwater metal. Note: The whole machine cannot be used in water, and switches and speakers cannot be immersed in water. 4. 360 Detection: 360 strong induction coil, high sensitivity. Powered by 1 x 9V battery (not included), free yourself from the shackles of wires or power outlets, and can be used anywhere. 5. with Storage Bag: Portable storage bag can be hung on backpacks, belts, and clothes, easy to carry. Specification: Material: Plastic + Electronic Components Product Color: Green, Blue, Cyan Product Size: 230 x 41 x 26mm Product Weight: 141g Battery: 1 x 9V Battery (Not Included) Working Frequency: 12 kHz Detection Method: Vibration, Sound Alarm Detection Depth: 4cm Working Environment: -35F (-37)~158F (70) Package Included: 1 x Handheld Metal Detector 1 x Portable Bag 1 x Hook 1 x Manual