120-decibel alarm for maximum protection: A loud alarm immediately deters thieves and alerts you instantly to an attempted theft. This way, you can be at ease, even when your bike is unattended. Weatherproof and vandal-proof: Made from durable materials that can withstand all weather conditions and tampering. Rain or shine, your bike is reliably protected. Easy installation: Easily attaches to most disc brakes without tools. Install and use in less than a minute, no annoying installation steps required. Lightweight and portable, safe and reliable: This disc brake lock fits into any bike bag. Perfect for commuters, students, and recreational cyclists who always need reliable protection against theft. Universal compatibility: Fits almost all modern bikes with disc brakes. Suitable for road bikes, mountain bikes, electric bikes, and city bikes. Specifications Color: Black Dimensions: 9 × 6.8 × 3.3 cm Total weight: 450 g Package contents: 1 x Disc brake lock with alarm + 1 x Reminder cable Note: Please allow 1-3 cm clearance for disc brakes due to manual measurement. Thank you for your understanding.