Slime's New Elite Digital Tire Gauge What is Pressure Airlock Technology (PAT)Slime's new Elite Digital Tire Gauge takes air pressure innovation to the next level! That 1 to 2 psi you lose every time you check your tire pressure? Not any more! Slime?s advanced Pressure Airlock Technology locks in the air, so there is ZERO air loss when checking your air pressure with this gauge. Gain the most accurate tire pressure reading every time!    Plus, the Elite Digital Tire Gauge makes it easy to see your tire pressure reading with its super big, bright LCD screen (43% larger than the world's most popular tire gauge). Add in a thoughtful ergonomic design with a light to illuminate your work space and you have yourself an awesome tire gauge. Remember that hissing sound that comes out of your valve stem when checking your tire pressure? That's the sound of air escaping from your tire. With a traditional tire pressure gauge, you lose 1 to 2 psi every time you check your tire pressure.   Well not anymore! Slime's new patent pending Pressure Airlock Technology uses a dual stage seal to lock in the air for ZERO air loss. Which means you get the most accurate tire pressure reading every time. You can improve your gas mileage by around 3.3% by keeping your tires inflated to the proper pressure. Under-inflated tires can lower gas mileage by 0.4% for every 1 psi drop in pressure of all four tires. Properly inflated tires are safer and last longer. Elite Digital Tire Gauge Instruction Manual How to Replace the Batteries on the Elite Digital Tire Gauge Multicolor, Multi Vehicles, 7.2"', '1.1"', and '0.18 lbs