Yihi SXmini SL Class Manuel D'utilisation page 68

Selection & Operating of the Menus
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b) Move the joystick to the right to select a flash memory from M1 to M5.
c) Move the joystick to the left to select an aroma mode from Eco, Soft, Standard, Power, Powerful+,
SXi-Q-S1 to S5.
3. Display Brightness
Move the joystick up to adjust the brightness of the display.
4. Switch between Bypass and Normal Mode
Pull the joystick down for three seconds to switch between Bypass Mode and Normal Mode.
5. Resetting Resistance
Press the joystick for five seconds to reset the resistance for the atomizer head.