Remove Back Cover
There is a buckle on the
back cover.
When removing it (or
install it again), the buckle
has to be fitted exactly
into the the "buckle port"
press and slide down
at straight line.
Rear view of clock when removing the back cover
Reset
Power ON /OFF
"Buckle Port"
Buckle
MicroSD
Memory Card Slot
USB
DC charging port
Power "P" working switch