High AccuracyLongruner gauge is made of durable metal and waterproof design, for accurate measurement. With professional calibration, always keep a reading within 1% of your exact tire pressure and 0.1 display resolution. No more guessing! Accurately measures a range of 0 to 200 psi. Leak-proof and valve extension designReal brass air chuck provides a great seal on the tire valve at all times. exterior of the car tire and frees your hands to operate the tire pump. Quick connect 1/4 NPT male fitting are all integrated into one unit. 90 degree valve extender connects hard-to-reach tire valve inside car tire. 3-in-1 Multifunctional DesignDesigned for checking tire pressure; connect the air pump to inflate the tire; deflate air if tire pressure is high. Also a tire inflator for inflating tires when connecting an air compressor. A tire deflator to quickly evacuate overinflated tires by pressing its air bleeder valve. Battery Savingautomatically turns on and automatically turns off after 20 seconds of inactivity to preserve battery life; built-in air bleeder valve to quickly reduce pressure in overinflated tires. Increased Safety Properly inflated tires provide better performance in all weather conditions, reducing the likelihood of pairing, explosions and accidents. Increase your MPG and save money on fuel costs and tire wear. The tire pressure gauge can be applied to different types of vehicles: construction vehicles, trucks, racing, HGV, SUV, vans and cars.