Overview: Motorbike alarm security bicycle steal lock moped Great product to protect your bicycle/bike Ultra loud 110d B alarm -- scares potential theives away Don't let bike thieves get the better of you – protect your investment easily & effectively with the movement triggered alarm which emits a scarily loud sound if your bike is tampered with. No thief will want to hang around when this alarm goes off! Traditional chains, padlocks & U Locks only do half a job & can be pretty easily removed by those who know how, but even the sight of this alarm will have even the most determined of thieves thinking twice. Attach to your bike, press 'B' for 2 seconds to set it & walk away safe in the knowledge that it will remain secure & protected whilst you are away. If your bike is moved the alarm springs into action & gives off an ear-shattering shriek for 15 seconds – & you can bet that you won't see your bike's assailant for dust! Protecting your bike couldn't be simpler: Attach to your bike gt; Go for a ride gt; Set the lock to 'protect mode' by pressing 'B' for 2 seconds gt; If your bike is tampered with the alarm will sound for 15 seconds gt; Return to find your bike where you left it! gt; To disarm the alarm enter your 4 digit code (i.e. ABCA) gt; Carry on cycling Specification: Dimensions:3.78in 2.36in 1.46in