PUMPKIN Tire Pressure Gauge 60 PSI Heavy Duty with 2.5&rdquo;Glow Dial and Integrated Hold Valve for Car Truck Motorcycle Bicycle High Accuracy & Mechanic Recommended: Performance tested, certified accurate, & calibrated to ANSI B40.1 International Accuracy Standards (2-3%) to ensure you get an instantaneous, accurate reading. Easy to read: Large 2.5 inch glow dial features easy-to-read both PSI and BAR readings clearly even in the darkness. The pressure reading will "lock" in place until the pressure reset button on the neck is pushed. No Battery Required: This tire pressure gauge doesn't require any batteries, offers you accurate and reliable readings in all weather all conditions. Save you the battery money. Easy to use: 360 Adjustable swivel chuck for easy valve access, pressure reset button to reset readings, and built-in air bleeder valve to reduce pressure in overinflated tires. Solid Build: well-built steel stem with rugged rubber case; extended 5mm chuck tip to form a strong seal with no air leakage; 45 extended head fits easier on awkward valves and motorcycles.