Slime's new Elite Digital Tire Gauge takes air pressure innovation to the next level That 1 psi to 2 psi you lose every time you check your tire pressure. Not any more Slime's advanced Pressure Airlock Technology (P.A.T. ) 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 (50% larger than most digital tire gauges). Add in a thoughtful ergonomic design with a light to illuminate your work space and you have yourself an awesome tire gauge.