Wireless bike alarm anti-theft device electric vehicle remote control mobile induction alarm Functions: induction vibration host alarm, wireless remote control, 3 kinds of car search ringtones, dump SOS prompt. Principle: vibration sensor detects vibration Frequency: 433 wireless frequency Battery: three No. 7 batteries for host (normally 3-4 months battery life), one 12V remote control 27 A (more than 1 year). Comes with default battery (removable battery) Wireless remote control distance: 10~25 meters, open 80~100 meters Alarm sound: 113dB Host Waterproof Level: IP65 Product scope of application: bicycles, electric vehicles, motorcycles, household doors and windows, etc. Inductive vibration triggers alarm and anti-theft. Note: The picture is for reference only, please refer to the actual product, thank you. Product Name: Wireless Bike Alarm. Product Material: ABS Color: Black Size: approx. 100*95*32mm Product weight: approx. 130g Scope of delivery: 1 set