Review on Accurate and Convenient: Introducing the Topeak Smart Head Digital Air Pressure Gauge by Chad Sorensen

The first problem with this gauge is that the gauge I was given only registered 0.0lb on Schrader valves, I don't have it on Presta- valves tried. The second problem is that if you throw it in a bag or package, the power button is permanently on. It is not protected by a frame and turns on at the slightest touch. Finally, it comes in sturdy plastic packaging - with nothing short of rivets - that you'll have to pierce with sharp objects and brute force.