Description Material: plastic Size:11cm/4.3" (approx) Quantity: 1pc Color: Black ， Silver Digital display tire feet， Used to measure the tire tread depth Can effectively reduce tire wear， Suitable for motorcycles， trucks and suvsSpecifications: 1 Range:0-25.4mm 2 Resolution :0.01mm 3 Working temp: 0-40¡æ 4 Battery: SR44/LR44 1.5V (Battery not include)Important: 1 keep the gauge clear 2 no water oil on bar(1) 3 Remove battery when not used for long periods 4 Display flashes when battery power is low 5 Accidental display failure : take out battery for 30 secondsHow to use: as picture show 1 Insert battery in (2)，+pole upward 2 Switch ON(4) 3 Put base (5) on flat surface and press bar(1) downward 4 Set ZERO (3) 5 Put gauge on tyre， hold stable and press bar tip (6) into tyre profile 6 Read profile depth value directly 7 Switch OFF(4) or continue Note: Due to the difference between different monitors， the picture may not reflect the actual color of the item. Thank you! Package Included:1 x Car Tire LCD Digital Tread Depth Tester