110dB Alarm Bike Chain Lock with Remote Control, 8mm Manganese Steel & IP65 Waterproof Design 

This advanced alarm chain lock is designed to deliver both powerful physical protection and active theft deterrence for bicycles and other valuables. Featuring a built-in 110dB alarm system, the lock transforms from a simple security tool into a proactive guardian. Using the included wireless remote, users can easily arm or disarm the alarm, while the lock itself is always opened with a physical, tamper-proof key, ensuring dependable mechanical security even without electronics.

Once armed, the alarm sensor inside the lock head instantly detects impacts, cutting attempts, or rough handling. Any unauthorized movement triggers a piercing 110dB siren loud enough to startle thieves and alert people nearby, dramatically increasing the chance of theft prevention. This immediate sonic response makes the lock highly effective in both busy urban environments and quieter residential areas.

The lock’s strength comes from its 8mm hardened manganese steel chain, engineered to resist bolt cutters, hacksaws, and physical attacks. The reinforced zinc alloy lock body adds drill resistance for enhanced durability. Designed for real-world use, the lock head carries an IP65 waterproof rating, protecting it from rain, dust, and water splashes. A protective fabric sleeve covers the chain, preventing scratches on bike frames while also reducing rust for long-term performance.