This eight in one digital emergency gauge is the perfect tool for travel. This unique tool includes everything you need to stay safe and get back on the road quickly. The digital tire gauge offers an instant, accurate and easy to read display as well as an automatic shutoff after 30 seconds. This amazing tool also offers some great safety features such as a built in hammer to break glass and a seatbelt cutter to help free you quickly in emergency situations. With its green, red and yellow indicator lights, the built in tire tread depth gauge can identify exactly how safe tire tread levels are. The back side of this safety tool has two magnets which can be used to attach to the car while activating the red flash warning light to alert other drivers. The included tire deflator helps regulate the tire pressure, providing better gas mileage. A built in LED flashlight creates an additional safety feature for those all hour roadside emergencies. Includes 2 AAA batteries.