1) sensitivity and longrange detection The bike security lock alarm uses sensitive probes with remote control and alarm sensors located 10 meters above the terminal. In open areas, the effective range can reach up to 30 meters, helping deter theft even when you are not right beside the bike. 2) Loud, controllable alarm Red button activates the vibration motion sensor siren, producing a buzzing sound. Gray button cancels theft, and two beeps will sound. The alarm uses vibration induction and will sound excessively after about 20 seconds, providing a clear warning to potential thieves. 3) Easy to carry Compact and refined design with a keychain and a remote control for easy carrying. Provides security for cyclists, with the buzzing sound lasting for nearly 20 seconds if an attempt is made to unlock the bike. 4) Easy to install and compatible Cycle anti theft lock is easy to install, effective, and convenient to use. Suitable for locking bikes and ensuring safety after installation. Compatible with all bikes, electric bikes, and motorcycles with disc rotors. Use scenarios Parked in public spaces: The system's sensitivity and longrange detection help deter tampering while you are nearby or slightly away from your bike. Daily commuting: Keep the remote control on your keychain; if someone attempts to move or unlock the bike, the buzzing alarm lasts about 20 seconds to deter the theft. Varied vehicles: Suitable for all bikes, electric bikes, and motorcycles with disc rotors, providing security across different bike types and setups.