This stomach metal detector has high detection accuracy, a pin can be detected accurately.Adjustable sensitivity with vibration function, easily adjust the detection accuracy, and the handle is user-friendly and non-slip, more convenient for work. Sound (or vibration) and light simultaneous alarm function, high quality ringtone sounds clear and loud.Wide detection range, not only sensitive to iron, but also high accuracy of detection for copper, zinc, aluminum, tin and silver. Functional circuit design, while using the battery, the accuracy of metal detection remains unchanged. Prompt to replace the battery, the system constantly detects the power. When the power is depleted, the buzzer continues to sound to remind you that the battery needs to be replaced. 'energy: one standard 9 V alkaline battery (not supplied) can operate for more than 20 hours (10% ~ 15% alarm report). Reserve charger socket, which allows the rechargeable battery purchased in the instrument to be charged directly via the charger, which saves energy and money. Specification: Condition: 100% brand new Material: plastic Usage: Metal detector Working power: 6F22ND 9V battery (not included) Alarm mode: sound and light, vibration (switching) Product size: approx. 14 x 21cm / 5.5 x 8 , 3 inch Weight: approx. 300g / 10.6oz Package list: 1 x metal detector (battery not included) / p 1 x user manual Note: 1. Please allow 0-2cm 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.