The Meiser listed above in this same section is superior. This gauge is fine, but not great. Its fidgety/difficult/beepy. The feature that lets you slowly come down to the pressure you want is lame compared to Topeaks own Shuttle Gauge. If you just want quick accurate pressure with pretty much no loss in pressure as you check - the Meiser is a better pick from Excel. If you want a gauge to add in front of a pump with no gauge or really want the bleed feature - Topeaks Shuttle Gauge is much more solid and more versatile. Neither of these require batteries. (I have all three and a couple more.) Compared with several other gauges I have, this seems quite accurate. Its just awkward to use due to the pivoting head and it seems to turn on and beep and run out of batteries. 4 stars is generous.