They combine the proven 3D-sensitive alarm system with an advanced security category. As a result, the toughest ABUS folding lock on the market is now even more robust. Thanks to the intelligent ABUS alarm system, your neighbors will no longer be frustrated by constant false alarms. The full alarm is activated only in the event of a suspected attack; accidental bumps and movements, on the other hand, trigger only a brief 5-second warning.