Digital Pocket Tire Pressure Gauge and Auto Emergency Tool is designed to measure tire pressure and read PSI, BAR, and KPA through a durable metal nozzle. Bright backlit LCD screen. Constructed with a steel window escape hammer, which quickly deploys at the flip of a switch, and a recessed blade to cut through seatbelts in case of an emergency. Features a bright LED flashlight for nighttime emergencies, and a red LED light to reveal the valve stem when measuring tire pressure in the dark. Powered by two AAA batteries (not included).