Get notified whenever your bike gets stolen with the help of this Smartphone Alerting Bike Alarm. It might look like a typical bike light which will attach to your seat post. But the built-in motion sensor will detect movement and will instantly send an alert to your smartphone via Bluetooth. You can also track the bike’s location from the corresponding iOS app by using the alarm’s built-in GPS. Alternatively, the alarm can be used as a standard bike light to notify drivers of your presence on the street while you’re biking. The alarm is capable of notifying a smartphone up to a distance of 80’ and includes a rechargeable battery which can last for up to two weeks at a time. Charging takes a time of two hours only via the included adapter. It’s definitely a useful accessory for bike commuters.