Icedot Crash Sensor
If you regularly find yourself on your bike — whether you use it to commute to work, or to stay in shape — you know the risks of riding: you're never too far away from a crash that could mean serious bodily harm. But with the Icedot Crash Sensor you can ride confidently knowing that if you do find yourself getting acquainted with the pavement, at least help will be on the way shortly. Made to attach to the back of your helmet, the sensor knows when you've been in an accident, triggering an alarm that will alert your emergency contacts if you don't turn it off. It works with low energy bluetooth, so it can always be connected to your phone without wearing out your battery.