Ring's RTG4 is a digital tyre gauge with keyring attachment – great to have with you in case your tyres need checking. This award winner has an accurate gauge that gives readings in PSI, kPA, BAR and kg/cm2. Readings are easy to see on the backlit digital screen. The gauge comes with an integrated LED light to help you find the tyre valve in the dark. Not only will having the optimum tyre pressure increase the safety of your journey, it will also drive down the cost of your fuel bill, as properly inflated tyres are more fuel efficient.