Romic's RMA3001 5-in-1 digital tyre pressure gauge is a high quality multi function tyre pressure gauge. No one likes to dwell on the scary scenarios that could occur in a car accident, but it’s important to be prepared for emergencies. When every second counts, the Romic 5-in-1 device could aid your escape. It helps you keep your vehicle safe for driving by keeping tyre pressure in check with an easy to read, back-lit led display for tyre pressure in the range of 3-150 psi. It has a bright led light for night time use. It provides safety features such as seat belt cutter and a glass breaker hammer. Imagine getting trapped in a car with jammed seat belts and inoperable windows or being trapped outside a car with a child stuck inside. The hammer tip can break window glass (not windshields) and built-in blades can cut jammed seat belts. Moreover maintaining the manufacture recommended tire pressure not only for your safety, but also improves your gas mileage.