The ideal compact, lightweight solution for quick locking, on-the-fly security. 6mm pushdown hardened-steel locking pin, pick-proof key barrel and ice-spray proof construction. Perfect for scooters, e-bikes and bicycles with brake discs. Shock & motion sensors trigger a piercing 120dB anti-theft alarm powered by a single CR2 long-life Lithium battery. Self-arming, with no on-off switch, re-sets to armed mode within 15 seconds. One year battery life. The alarm module slips out for easy servicing/battery changes.