MD3003B1 Handheld Metal Detector Security Scanner – Single Switch Operation with Dual Alarm Modes: Sound, Light, and Vibration,Railway Station Airport Security Handheld Metal Detector

OverviewHow to use: 1. Push the power switch (8). When you hear a "click" sound or a vibration, it indicates that the power is on and the green light is on. If there is no sound or vibration, it means that the battery is not installed or the battery contact is poor. If the alarm continues continuously, it means that the battery can no longer be used and should be replaced with a new one. 2. After the sound stops when the power is turned on, high-sensitivity detection can be carried out. Hold the handle and scan the detection surface around the object to be measured. If there is a metal object, an alarm will sound, and at the same time, the green light will change to red. Stop scanning and the alarm will sound. Stop, the red light turns to green. 3. Low sensitivity test: If you need to exclude very small metal objects, you can press and hold the low sensitivity switch (3). Scan the area around the object to be measured. If there is a metal object, an alarm will sound and the green light will turn to red. Stop scanning and the alarm will stop and the red light will turn to green. Because the sensitivity is reduced by more than 5 times at this time, the objects detected at this time are generally relatively large metal objects.