The Wireless Bicycle Vibration Alarm with USB rechargeable feature is a reliable anti-theft system designed for bicycles and motorcycles. This alarm uses vibration detection to trigger a loud 115dB alert, helping protect your vehicle from theft. It is equipped with a built-in 400mAh lithium battery operating at 3.7V, offering convenient USB recharging for extended use. The system includes a remote control for easy operation, with a signal range of 10-80 meters, capable of penetrating walls. The remote uses a 12V/27A alkaline battery. Constructed from durable ABS material, the alarm is water-resistant with an IPX5 rating and functions effectively in temperatures ranging from -10°C to 60°C. Available in black, the package includes 1 x Alarm Unit and 1 x Remote Control. Other items shown are not included. Note: Color may vary slightly due to lighting and display settings. Size may vary by +/- 1-3cm due to manual measurement.