The Oxford Boss Alarm has been independently tested and approved by: Sold Secure (Gold standard), SBSC Intygad Produkt, ART 4075 (16mm version)
As well as being an extremely secure lock, it comes with a built-in alarm which is triggered by movement sensors; you can also lock it up without setting the alarm.
Reliability is asssured by 5-year life-cycle testing (by Thatcham Research)
The removable, sealed unit alarm module is weather-proof against water, frost and heat, as well as vibration-resistant
Batteries Included (6 x LR44)
Three keys and a key replacement service provided
Can be used as a disc lock or a padlock
Very loud 100db alarm
Also available with 16mm shackle for more extreme security conditions
Can be used with a chain to create the perfect chain lock (OF7/8/9)
Batteries x 6 (Oxford part number: OF229B)
Alarm module (Oxford part number: OF3A).