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1. Press the button twice within 1 second to enter preheat mode.
2. Press the button three times within 1.5 seconds to switch output gears. The current voltage gear and the corresponding fuel tank L or R light will be displayed for 2 seconds.
The switching order is 2.4 -> 2.8 -> 3.2, with the default power-on setting of 3.0V.
3. Press the button five times within 2 seconds to power on. The light will illuminate from bottom to top for 1 second, then stay on for 2 seconds, and then turn off from top to bottom for 2 seconds.
4. Press the button once within 500ms to switch between left and right fuel tanks. The current voltage gear will be displayed. The corresponding fuel tank L or R light will illuminate for 2 seconds, followed by the current battery level. The corresponding fuel tank L or R light will illuminate for 2 seconds.
5. Press and hold the button for 500ms or longer to enter dual fuel tank simultaneous operation mode. The current voltage gear will be displayed. The L and R lights will illuminate simultaneously for 2 seconds, followed by the current battery level. The L and R lights will illuminate simultaneously for 2 seconds.
6. After the screen is off, press a button once to immediately illuminate the screen to show the current battery level. The corresponding fuel tank L or R light will illuminate for 4 seconds. All button functions will switch between states after the screen is illuminated.