Garmin just announced two new navigation computers that include bike alarms. The Garmin Edge 830 and Edge 530 units will set off an audible alarm and notify your smart phone if your bike is moved. I think you need to be within Bluetooth range, so this would be for short term/short range stops. Nice feature for coffee stops and quickie marts--especially if you're in the market for a new navigation device. The units also integrate with Garmin's Varia rearview radar and taillight blinker system which warns on approaching vehicles.