USB-C Rechargeable: The Zoiinet bike alarm is powered by a built-in rechargeable lithium battery, which can be charged via a USB-C charging cable (included). A full charge lasts for 1 to 3 months (depending on the alarm frequency). No battery replacement is required. Multifunction: Built-in motion sensor and vibration alarm system for anti-theft protection. The super-loud alarm can deter thieves and protect your vehicle from theft. Or install it on the door or window. The alarm will be triggered if someone tries to open it. Adjustable Volume and Sensitivity: 110 dB super-loud alarm deters potential thieves. 3 adjustable volume levels prevent loud or quiet noises. 7 adjustable sensitivity levels, from gentle touch to bumping or knocking, can be easily adjusted as needed. Easier Installation: 3 installation methods to choose from. Mounting with a bracket is more convenient for changing the installation position. Mounting with cable ties and double-sided tape is suitable for irregular installation objects. Suitable for bicycles, scooters Remote control: The remote control range is up to 70 m, making it easy to find your vehicle in the parking lot; 3 ring types to choose from; IP65 waterproof allows you to use it safely outdoors Product specifications: Alarm battery: 700 mAh Alarm charging port: USB-C 5 V Waterproof performance: IP65 waterproof and dustproof Working frequency: 433.92 MHz Working environment temperature: -40 to +70 degrees Celsius Working environment humidity: <80%