Protect your pride and joy with the Knog Scout Bike Finder and Alarm. The Scout provides unparalleled bike security by combining an extremely loud 85db bike alarm function with a highly accurate bike finder, using Apple's "Find My" app. 
 
Once armed, any movement of a Scout fitted Bike will trigger the motion-sensitive audio alarm discouraging any further movement and alerting the bike's owner, both by the sound of the alarm and via a notification that is automatically sent to the owner's iPhone (when in Bluetooth range).