USB Rechargeable, No Need to Replace Batteries - The bicycle alarm is powered by a built-in rechargeable 4.2V 700mAh lithium battery, which can be charged by a DC5V power adapter, and comes with a USB-C charging cable, no need to replace batteries, save money. The bicycle alarm adopts 4-version energy-saving technology, and can work for 1-3 months after a full charge (depending on the frequency of the alarm). 3 Installation Methods, Wider Use - Comes with a mounting bracket and double-sided. Tape, 3 installation methods. Bracket installation is more convenient to change the installation position. Cable ties and double-sided tape are installed, suitable for items that are occasionally installed. Easy to install and use. Anti-theft alarms are a must for bicycles, electric bicycles or motorcycles. Adjustable Volume and Adjustable Sensitivity - A loud alarm of up to 110 decibels can effectively deter potential thieves and give you peace of mind. Made bicycle alarms have excellent performance. The volume is adjustable in three levels, so you don't have to worry about whether the alarm will ring or not. 7 Adjustable Sensitivity Levels - From light touch to tap or click, set it according to your needs. Remote Control - Remote control, updated remote control, powerful wireless range up to 164-260 feet. Vehicle search function, easily find your vehicle in the parking lot, 3 ring tones to choose from. IP54 waterproof, suitable for outdoor use. Multifunctional Alarm - Vibration triggered alarm, useful anti-theft device for bicycles, e-bikes, motorcycles, mopeds, trailers, luggage, doors and windows... More functions: battery indicator / low battery indicator / long battery life / more alarms and remote controls can be added (Note: this alarm kit is not compatible with B0734QN8KR / B01HUSRP7RP7RP7RP70. Color: Black Material: Plastic Package Contents: 1 * Bicycle Alarm (Including Battery) 1 * Remote Control (With Battery) 1 * USB Type-C Cable (Charging Adapter Not Included) 1 * Mounting Bracket Accessories 1 * Specifications 2 * Cable Ties Only the above package contents are included, other products are not included. Note: Light and different displays may cause the product color to be slightly different from the actual measurement, the allowable error is +/- 1-3cm.