Topeak Smarthead Digital Pressure Gauge

Topeak Smarthead Digital Pressure Gauge - the only thing this has going for it is it is capable of determining accurate tyre pressures on your bike.

Unfortunately, it doesn't do it for very long. The readout is covered by a plastic cover which fell off on the first day of a tour for which it had been purchased. After a few more days, using it to check my tyre pressures, it disassembled itself as I removed it from the tyre valve, springing apart in different directions, and took me an irritating fifteen minutes to discover where all the pieces went and stick it all back together. Since then, every time it's used, it springs apart. Topeak claim there is no known problem with these, but a fellow cyclist confirmed he had exactly the same issues.

Total waste of money.