Turn the inner ring anticlockwise.
Pull out the inner ring together with the bulb outward
Hold the lamp holder and unplug the bulb
Lift up and slide out the old bulb.
Insert a new bulb.
You need GU5.3 (or MR16) halogen lamp.
Do not use LED lamps instead of halogen as different power source is needed.
Plug a new bulb into the lamp holder
Insert the inner ring into the mount on the ceiling. Remember to insert the two lugs of the ring into the holes of the ceiling mount.
Turn clockwise.