- Alarm function: Alarm triggers immediately if the wire rope is cut or the locking screw is unscrewed. Alarm also sounds when the lock is shaken or moved. If the wrong password is entered three times, it calls the police. The alarm sounds over 110 decibels. - Long standby time: Low power consumption with long standby. Powered by three AAA No.7 batteries; standby time up to 8 months with a low power indication. When the battery is below 20 percent, the low battery indicator in the app warns you. - High quality materials: The bar lock is made of ABS plastic and high density copper. It is waterproof, anti theft and built from high quality materials. IP44 certified for indoor and outdoor use. Operates in a temperature range from -10 to +60 C. - Scope of use: The chain lock can be used as a wheel lock, scooter lock, and motorcycle lock. It is also very suitable for shops, offices, factories, restaurants and other large premises. Wide application range and high safety. - Use scenarios: Secure a scooter or motorcycle in public parking by locking through the wheel and frame. Use in a shop or warehouse to protect inventory or equipment. Apply in offices or restaurants to secure bicycles or small vehicles during closed hours.