Before hanging the clock, *gently* plug the micro USB end of the cable into the left side of the clock's circuit board. Use one hand to keep the board stable while you plug in the cable.
Hang the clock on the wall via the string on the back.
Plug the other end of the power cable into a wall outlet. The clock should turn on and start telling time!
Use the +HOUR, +MIN, and -MIN buttons to adjust the time to the current time zone.