Feature: 1. 4‑in‑1 multi‑function detection, metal detection, wood detection, alternating current detection, cavity detection. 2. The product is compact and easy to use, handheld and anti‑slip body for comfortable and firm grip. 3. The product has a five‑level strength display, the weaker the strength, the longer the distance, and the strength is different for different sounds. 4. It has a wide range of functions. It is one of the essential tools for home and travel, and it is very popular among users. 5. With a large LCD display, the graphics and numbers are clear and easy to read and observe. Specification: Item Type: 4 in 1 Detector Material: ABS Color: As shown in the picture Size: Approx. 145x55x33mm / 5.71x2.17x1.30in LCD Size: Approx. 43x33x3mm / 1.69x1.30x0.12in 3 Function Buttons: ON/OFF/►, PUSH Application: Metal detection, wood detection, alternating current detection, cavity detection can detect 24mm Power Supply: 1x 9V 6F22 (Not included) Low Voltage Prompt: 7.2V Quiescent Current: 25μA Environment Temperature: 25℃ Project Unit Minimum value Typical value Maximum value Battery supply voltage V … 9 … Quiescent current µA … … 25 Display current µA … … 300 Alarm current mA … … 45 Low battery display V 7.1 … … . Package List: 1 x 4 in 1 Detector(Battery Not Included) Note: 1. Please allow 1‑2in 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.