Protocol 6-in-1 Digital Tire Gauge & Car Safety Tool - "Autosave" Absolutely the best digital tire guage on the market Backlit digital tire pressure reading; choose between PSI, KPA or BAR unit Car Emergency Tool has built-in flasher, utility light, glass breaker, seatbelt cutter One finger pressure release valve makes it easy to adjust tire with one reading Compact, rugged, useful - a must for every glove compartment