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Three operating modes:
- Press the button for the first time to enter sleep mode, and the sleep mode indicator light flashes.
- Press the button once more to enter the low-speed mode; the low-speed mode indication light will remain lit.
- Press the button once more to switch to high-speed mode, and the high-speed mode indicator light stays lit.
- Press the button again to go into standby mode, then cycle through the options one by one.
- Set a four-hour shutdown time; press and hold the power button for three seconds to change the current working mode indicator from steady on to flashing.