Features It is made of ABS plastic material, anti-fall and wear-resistant, compact and portable, foldable freely. The handle is ergonomic, comfortable to grip and easy to use, and the probe rod is retractable. The product has quick response, accurate detection, quick battery installation, and long battery life. The gold detector has a mechanical finger mode, which is convenient to use and measure. Suitable for many situations, such as schools, science laboratories, outdoor adventures, etc. Specification: Item Type: Metal Detector Model: MD3002 Material: ABS Power supply: 1 x 6F22 9V (battery not included) Application: metal detection, outdoor adventure, treasure entertainment, popular science education Measuring range: approx. 10-15cm/3.94-5.91inch Signal frequency: 3.1KHz +/- 1KHz Current: static 41.89mA Maximum current: 86.45mA Voltage: 8-9V Sensitivity: US 25 Cent 100-120mm Display Mode: Mechanical Pointer Mode Package List: 1 x Metal Detector (Battery not included) 1 x Manual Note:This product is suitable for popular daily science education, outdoor adventure, not for professional surveying work Package List 1 x Metal Detector (Battery Not Included) 1 x Manual