Protect your bike or electric vehicle with this USB rechargeable vibrating alarm. The waterproof and design ensures ease of use and reliability. With remote control and anti-loss safety sensor, it provides enhanced security for your vehicle. Never worry about leaving your bike unattended! Made with high-quality materials to the safety of your vehicle Function: Sensing vibration, host alarm, remote control, wireless control, 3 types of car search ringtones, tipping SOS prompt Principle: Vibration sensor senses vibration, wireless 433 frequency remote control Battery: Three remote control CR2032 buttons for the 7th battery of the host. One button is included by default and shipped with a detachable battery Product scope of use: Bicycles, electric vehicles, motorcycles, household doors and , etc. Inductive vibration triggered alarm anti-theft manufacturer Wireless remote control distance: 10-25 meters, open space 80-100 meters, alarm sound 113dB Material: ABS colour: black Package Contents: 1 x Host 1 x Remote Control Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.