Digital thickness gauge power supply: 1.5v button battery Working temperature: 0-40 Resolution: Percentage: 0.01mm/0.0005'' thousand dots: 0.001mm/0.0005'' Measuring range: 0-12.7mm/.5'', 0-25.4mm/ 1'' Weight: 173g Instructions: 1. Wipe the upper and lower measuring heads clean 2. Press the switch key, turn on the power, and check whether the display is normal 3. Check whether the display is zero when the upper and lower measuring heads are closed, if not, press the zero key to clear the zero. Press the control lever to make the upper probe and the lower probe have enough distance, the workpiece to be testedis flat on the lower probe, then loosen the control lever, so that the upper probe is pressed tightly on the workpiece, and then read 5. Battery installation method : Rotate the battery cover with a workpiece or fingernail in the direction of thearrow on the back of the product to remove it, install the battery (the positive side of the battery is upward), and install it in the battery cover. Precautions: 1. Thickness gauges are precision tools, and should be prevented from being hit and dropped when used to avoid loss of accuracy. 2. It should be kept clean to avoid the penetration of liquid substances such as water into the thickness gauge, so as not to affect the normal use. 3. No voltage can be applied to any part of the thickness gauge, and do not engrave with a pen, so as not to damage the electronic appliances. 4. When not in use for a long time, the battery should be removed.