Protect your valuables with the Anti-Thief Security Alarm Lock. This versatile, big-sized lock combines a robust padlock with a powerful built-in alarm system to deter thieves effectively. Constructed from high-quality, corrosion-resistant aluminum alloy, it's designed to withstand outdoor conditions, making it perfect for securing your bike, motorcycle, or even doors and gates. The motion-triggered alarm activates with a loud, 110db siren if the lock is shaken or tampered with, alerting you and scaring off would-be thieves. Easy to use and set, this durable and waterproof lock provides a high level of security and peace of mind.