Cyclists can now get an early warning of vehicles approaching behind them via Backtracker.
Available to pre-purchase only and seeking funding, Backtracker's makers say the innovative device provides riders with the speed and distance of rear approaching vehicles from up to 150 yards away.
In addition to increasing cyclist awareness, it also alerts cars to your presence through an intelligent backlight system.
Here's a video of the device in action:
And this is a lengthier promo: