In any light, day or night, the Digital Tire Gauge gives you an instant, accurate, and easy-to-read measurement of your vehicle's tire pressure. A simple push button turns the unit on and selects one of four measurement ranges. When its dark, the lighted nozzle illuminates your work area, so you can easily locate the valve stem. With gentle pressure, the nozzle seals onto the valve stem quickly and completely to deliver an accurate measurement. The exact measurement instantly displays on a clear, lighted digital screen, so theres no guesswork or estimation like reading an analog gauge. After youre done, a 30-second automatic shut off means you never have to worry about accidentally running the batteries dead. Contoured to fit your hand, the ergonomic shape is complemented by a soft, nonslip texture for ultimate comfort and control. Check your tire pressure often. Properly inflated tires keep you safe on the road and help you save on gas. Store this handy tool in your glove box or console, so it's always ready when you need it.