1. Electric Bicycle Safety System Kit, Waterproof Wireless Remote-Controlled Vibration Detector, 150db - Function - Universal, can be used as an excellent bicycle lock. Vibration-activated alarm, suitable for bicycles, motorcycles, electric bicycles, electric scooters, etc. You can also use the alarm vibration sensor for doors and windows. - Extremely sensitive to movement, with 7 levels of adjustable sensitivity, from a light touch to a push or a pat. You can easily adjust it according to your needs. Operated by a wireless remote control with a remote control range of up to 20m/66ft. - Super loud at 150db. The bicycle safety alarm can emit a loud sound to attract people's attention. The 150db sound can effectively deter thieves and can also be used as an SOS emergency signal. It can be pasted onto a motorcycle using double - sided tape or tied with a strap. No wires, no screws. Waterproof, IP55 rated - can be used outdoors. - Compact size, 3.7 inches * 1.6 inches * 0.8 inches. It has a unique and compact design, easy to hide and install. It can control 6 kinds of ringtones via the remote control, making it easy to locate the vehicle. 2. Specifications: - Wireless communication range: 10 - 20 meters - Operating environment temperature: -20 - 60 degrees - Alarm size: 65 mm * 45 mm - Remote control size: 58 mm * 28 mm * 11 mm - The 500 mA alarm battery has a standby time of 6 - 10 months. - The remote control requires a 12V/27A alkaline battery and has a standby time of over 1 year. 3. Package includes: - 1 * Alarm - 1 * Remote control - 1 * USB charging cable