The Oxford Boss Alarm has been independently tested and approved by Sold Secure and has been awarded Motorcycle GOLD standard, SBSC Intygad Produkt and ART 4075. As well as being an extremely secure lock, it has a built-in alarm which is triggered by movement sensors; it can also be locked without setting the alarm. Key Features:- Reliability is assured by 5-year life-cycle testing (by Thatcham Research) The removable sealed unit alarm module is vibration-resistant and weather-proof against water, frost and heat Very loud 100db alarm Can be used as a disc lock or a padlock Three keys and replacement key service provided Batteries included (6 x LR44) Combine with 12mm hardened steel chain to give additional security