Features: 1.Lighted nozzle and display screen for ultimate visibility in low light or at night. 2.Digital display instantly and clearly shows exact reading, eliminating the guesswork of analog gauges. 3.Three units available: PSI, KPA, BAR. 4.Two Functions:Test tire pressure and air release function(Release tire air by gently pressing). 5.Ergonomic design comfortably fits hand and features a soft, non-slip surface for sure grip.