Features:-The detection frequency range is wide and can detect RF signals such as GSM, 3G, 4G, 5G, Bluetooth and Wi-Fi 2.4G. And there are 4 adjustable frequency levels.-Built-in advanced smart chip, each function is more technical and easier to use.-It is light weight and small size, very convenient to carry and suitable for different places. Built-in rechargeable battery can last for 6 hours.-It ensures privacy and security protection by accurately detecting spy cameras, eavesdropping devices, wireless pinhole cameras, hidden infrared cameras, GPS trackers, etc. -Suitable for various places such as hotels, meeting rooms, vehicles, dressing rooms, etc.Specification:Material: plastic+metalColor: blackBattery capacity: 300mAhCharging interface: USB charg.