1.Press "POWER" Twice to change interface 2.How to set the charging amount interface: Press the buttons "+" and "-"simultaneously for 2 seconds to enter the charge setting interface. After entering the interface, the numbers will flash separately. Press "+" & "-" to adjust 1-9. Press the power key lightly to convert the required values and currency selection. Press and hold the "POWER" to save the settings, and start timing and billing. Notice: The current data will be automatically saved when the machine is switched on and off and the battery is replaced. At the same time, press the power button and the "-" for a long time to clear the data.
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