PRO ACCURACY - mechanic recommended, performance tested, & calibrated accurate to professional ANSI 2A standards - with dual pressure sensors certified to ±0.50% FS (1 PSI), offering reliable readings up to 200 PSI w/ precise readout resolution of 0.10 PSI - so you can now maintain your tires with a shop-grade mechanic trusted tool | STRONG & RUGGED - feels solid in the hand & built to last from 100% solid brass & steel parts shielded by our shock-resistant gear-style protective guard to protect against drops & impact. Features ultra soft & strong 10" fully rotational, leak-proof HybridFlex air hose w/ 360 swivel angled air chuck that can be swapped out w/ any 1/4" NPT chuck | ADVANCED ENGINEERING - all readings lock-on to the display until the "ON" button is pressed once to reset to zero. Features built-in air bleeder valve that bleeds pressure in real time without needing to reset the display - ideal for cars, trucks, motorcycles, bikes, RV & trailers, spare tires, and much more | SMART DISPLAY - features high-resolution digital 2.5 inch LCD display screen w/ battery life indicator & bright LED backlight for high visibility in the dark. Gauge is programmed to auto shut-off after 150 seconds of inactivity to save battery (2x AAA batteries included) | 100% Lifetime Warranty by JACO - serving the automotive industry for 35+ years. Enjoy longer-lasting tires, improved fuel economy, and superior vehicle performance & handling with properly inflated tires.