Finally, a Wireless Skate Speedometer, so now you can know how fast you’re skating. As an added bonus, it’s water resistant at up to 30ft/10m, for when you accidentally skate into a swimming pool.

You have to turn it on and off, because the batteries will only last 300hrs. I can’t imagine that would be hard to do, given where the wheel is – on the bottom of your shoe. And heaven help you if you forget, two weeks later your speedo will be knackered.

Of course, the wheels and bearings wear out, but they thought of that. Just buy your wheels and bearings from them! An electronics company! They’ll also sell you a battery kit, I guess because it uses special batteries or something. Or perhaps because they know you’re going to forget to turn the darn thing off.

They’ve got a big write-up on their site about how pushbikes have the wheel in contact with the ground all the time, but skates don’t, so their computer has to do all sorts of tricks to figure out the right answer. Perhaps hooking up a GPS might have been a better idea?

And of course, you have to consider the privacy implications or wireless transmission of personal data like your velocity…