Xiaomi DDL-M1 Operating Instruction page 16

Place the observation object
on the bottom observation
panel and place it in the
center of the reticle of the
observation panel.(Be sure to
make the side with the cover
glass face up,and don't put it
upside down.)
Rotate the focus wheel and observe the display
of the phone.At this time,you can slowly adjust
to the best observation magnification.(Adjust
the observation height and focal length to
achieve other multiple observations.)
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