1. It can detect metal items, is easy to operate, and supports one click operation for testing. 2. Simple and easy to use, compact in size, and easy to carry. 3. Equipped with a buzzer alarm sound, the buzzer sound an alarm when the detector detects metal. 4. With indicator lights, the LED red light flashes to alarm. When metal objects are detected, the red indicator light flashes to indicate the alarm mode. 5. Widely used, it can detect games and entertainment, conduct safety checks, and search for metal products on the body. Working current: around 23mA (under normal alarm conditions) Static working current: 3.7mA (without alarm) Power voltage: Two button batteries Working power supply: 3-5V Maximum detection range: 3-5cm, the larger the metal area, the farther the detection distance, and the smaller the metal area, the closer the detection distance Kit usage: gaming and entertainment, safety checks, searching for metal products on the body, etc. Color: As Shown Material: Plastic+Metal Package Contents: 1 x Detector DIY kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.