Ever wanted to know how fast that slapshot of yours is? Dont want to spend crazy amounts of money on a radar gun? Well, do we have good news for you! Clapometer is an incredibly accurate, and easy to use hockey shot "radar". It works by calculating the time your shot takes to travel a certain distance (either the red line, blue line or top of the circle towards the net) and then you get the speed of your shot! It works one of two ways, you can either have a friend press start/stop as you shoot or it even works completely hands free, just set it to start measuring and fire away and it will calculate your shot speed. Easy as that.