Bikers rejoice: the VeloCityLight could make it so you never get rear-ended again (unless you're into that sort of thing). Obviously when you share the road with cars, safety is more important than speed, but this rear-mounted device isn't meant to be viewed by the rider. The LED speedometer display shines bright (up to 175 lumens) so that vehicles can see when the bike slows and better judge the distance. The ANT chip and sensors calculate speed in MPH or KPH so no matter where you are in the world, they got you covered. With the USB rechargeable battery, you just plug it in and go.
The project needs your help to become a reality, hence the Kickstarter campaign. At the time of this post, the VeloCityLight Team has gotten £9,577 of their £40,000 goal. You have five days to shut up and give them your money, so go now.