1. Short press the COUNT RESET key to add 1, and long press the COUNT RESET key to zero.
2. Press the lock key and lock numerically. Press again and unlock.
3. Sleep mode will automatically enter if you do not use it for about 15 minutes. In sleep mode, after waking up by pressing the COUNT RESET key, the screen displays the value before sleep, at which time it can count normally.
4. Choose the channel according to CH. There are five channels.
5. Press the LED key, the light is on, the value can also be clearly visible at night.
1. It may be a little color difference, but it does not affect the use.
2. Please allow 1-3mm measuring deviation due to manual measurement.