High-precision measurement: measuring range is 0-30mm. Flexible and compact: Metric can be switched freely between inches and mm, easy to use. Not only easy to carry, but also easy to hang. Good workmanship: High quality materials and workmanship make it good quality and beautiful in appearanceUse: Digital tire tread meter perpendicular to the tire tread close, the bottom of the measuring rod pushed forward to the tread grooves and the degree. To make the product more accurate measurements, it is recommended to measure several times. Accuracy: 0.1 mm Power supply: SR44 / LR44 1.5V battery (Not included) Working temperature: 0 ~ 40 Material: ABS plastic Packaging: 1 * Digital depth gauge