Very good tire pressure sensor. Here are the pros and cons. In general, the design is powerful, the 45-degree swivel head is a nice addition and a must-have. Backlit display, very clear and sharp. Measurements are displayed in psi, bar, kPa, kgf.cm2. It has a high quality protective rubber around the display. The length of the hose is neither too long nor too short, just the perfect length! The pressure reading is held as long as you depress the release valve. The backlight will automatically turn off after 30 seconds and the device will turn off after 120 seconds to save battery. Now let's talk about the measurement. I know it's very close as I've compared it to another Jaco needle gauge and these seem to be within 1psi of each other. Cons: Now they are insignificant, but you should be aware of them. So the best measurement you will take is if you take the measurement with the nozzle pressed against the valve. Perhaps this was to be expected. If you don't press the bleed valve, the device will never turn off - it thinks it's still measuring, and this drains the battery. ALWAYS BLEED before storing. scratched. it is better to leave it activated (this is also a small problem). Overall a very good and reliable device.