Digital Tire Depth Measurements LCD Display Tyre Tread Depth Gauge Caliper- Digital large LED LCD screen display, easy reading.- Professional high precision measurement of tire anti-skid pattern depth.- Suitable for cars motorcycles trucks vans SUV.- One-touch switch between Metric/Inch system interchange.- Wear-resistant and Durable.- Mini size, hand-held and portable.A small and exquisite gift for your colleagues, friends, family or any other car enthusiasts, let you use it yourself!How to Use Professional Tire Tread Depth Gauge?Step 1. Insert battery in, "+" pole upwardStep 2. Switch on the tire depth gaugeStep 3. Put base on flat surface and press the bar downwardStep 4. Press Zero Button, the LCD screen will display 0.00mmStep 5. Put gauge on tire, hold stable and press bar tip into tyre profileStep 6. Read profile depth value value directlyStep 7. For accurate measuring, test it for several timesStep 8. Switch off the gauge, Please remove battery when you don't use it for long periodsSpecifications:Range: 0-25.4 mm / 0-1 inchResolution: 0.01 mm / 0.0005 inchWorking Temp: 0-40?Battery: SR44 / LR44, 1.5VBar tip Material: PlasticColor: BlackProduct size: 11.2 x 6 cm/4.41 x 2.36 inchesPackage includes1 x Digital Tread Depth Gauge with Built-in Battery1 x Portable Case