In any light, day or night, this Digital Tire Gauge gives you an instant, accurate and easy-to-read measurement of a vehicle's tire pressure. A simple push button turns the unit on and selects 1 of 4 measurement ranges. When it's 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 there's no guesswork or estimation like reading an analog gauge. 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.