In any light, day or night, the Romic RMA3002 digital tyre gauge gives you an instant, accurate and easy to read measurement of your vehicle's tyre pressure, helping you travel safely. Maintaining the manufacture recommended tyre pressure not only for your safety, but also improves your gas mileage. A simple pushbutton turns the unit on and selects one of 4 measurement ranges. The lighted nozzle illuminates work area in low light, so you can easily locate valve stem. With gentle pressure, the nozzle seals onto valve stem quickly and completely to deliver an accurate measurement. Instantly, the exact measurement is clearly displayed on the lighted digital screen, so there is no guesswork or estimation like reading an analog gauge. After you are done, a 30-second automatic shut off means you never have to worry about accidently running the batteries dead. Contoured to fit your hand, the ergonomic shape is completed by a soft, non-slip texture, for ultimate comfort and control. Check your tyre pressure often. Properly inflated tyres keep you safe on the road and help you save on gas. Store this handy tool anywhere in your car, so it's always ready when you need it.