The BTrack Safe Light is a tail light that allows you to track your bike if you lose it or if it's stolen from you. This device uses GPS technology to help you track it.
The light is fitted with an accelerometer and special sensors that can be 'armed' using the companion iOS or Android app. If someone starts fooling around with your bike, the sensors will detect the vibrations and alert you via text message. You can also adjust the sensitivity of your alarm so you don't get an alert every time someone brushes by your bike.
At $145, the BTrack Safe Light represents pretty decent value for money. It's the latest of many high-tech products designed for people who don't mind spending a little to secure their bikes.