Intelligent Burglar Alarm---with intelligent alarm function. After the alarm mode is activated, a loud alarm tone will sound when vibration is detected. 115dB decibel sound. Wireless Remote Control --- Equipped with a wireless remote control, the remote control range is 0-50 meters. Easy to use. Even in dark surroundings, you can quickly find the equipment using the remote control. Personality Settings---Sensitivity/Volume/Ringer Mode, they can all be set as needed. USB Charging---Built-in 400mAh rechargeable battery. It can be charged via a USB charging cable. There is an indicator of the remaining battery charge, so you can see the remaining charge at any time. IPX5 Waterproof --- Adopt IPX5 waterproof design. It can be used normally on rainy days. Suitable for bicycles, electric vehicles, motorcycles, outdoor camping equipment, etc. It helps to provide good safety protection.