JR ProPo DSX11 Operation Manual page 9

(2) Names and functions of parts on the rear side
Stick Spring Adjustment
Be certain to first remove the battery, then remove the screws in the six locations on the rear case. After adjusting the desired spring,
close the rear case and fix it using the screws. When closing the rear case, take care not to catch the lead wires in the case.
RF Output LED
Binding Button
Battery Charging Jack
Be certain to
remove the battery
first.
SD
*SD Card
The SD cards that can be used are cards which are 16GB or
smaller in size which have been formatted in FAT. Before
removing or inserting the SD card, first open the battery
cover and remove the battery.
In addition, depending on the SD card it may not be possible
to use some cards even when they satisfy the conditions
described above.
Trainer Jack