Gemini GMC500 Quick Start Manual page 6

"Function" button: In function mode, press this button to select the
function. When selected the function, the corresponding function
indicator will flash. If there is no other operation, the product will start
work automatically in 10 seconds later, the indicator light will turn on.
"Power" button: After the function is selected, press this button to
change the heating power of the product (from 100W to 600W, in 6-level).
You can also press this button to change the heating power after it starts
working. If you do not press this button, the product will work according
to the programmed power.
Remark: Heating power cannot be adjusted in the water-proof stewing
function.
"Preset" button: In standby mode, press the preset button to enter the
preset mode(time range 0.5 – 9.5 hours). After setting the preset
time, press the "Function" button to select the function, the product will
operate after you set the preset time.
For example: If you want to make soup after an hour, select the time by
pressing the "Preset" button at 1:00, press the "Function" button to select
the soup function, and the product will start working after one hour
automatically .
"Standby" mode: Switch on the power, the product has "beep" sound,
display screen shows "-- - " .
"Function" mode: Switch on the power, and select function.
"Operation" mode: the corresponding function indicator is always on,
the heating tube is on, and the display screen shows the operating time.
After starting the "Preset" function: During the preset process, the
corresponding function indicator light is on, and the preset time will
count down and show on the display screen. when the time counts to
zero, the product will enter to the operating mode.
End of operation: when the program is completed, the product will enter
to keep warm mode.