Low tire tread and bald tires can be very dangerous on the road, especially during wet weather. Avoid blowouts and punctured tires by being aware of the tread on your tires. This unique digital tire gauge is ideal for travel due to its compact size. The digital viewing window makes reading the tire tread depth gauge in both inch and metric scales quick and easy. The zero setting, or tare, works in any position for convenience. Includes 1 LR44 battery.