Size: 40cm diameter with a 1/2rpm Motor
Must be fixed securely to the ceiling and connected to a mains power supply.
Mirror Balls are one of the most commonly found pieces of equipment in Sensory Rooms, mostly used in conjunction with a Pinspot light.
But have you tried it with a projector focused onto it or just placed it in pool of sunlight?
The 1/2rpm motor is a slow and comfortable speed to watch.
Note: For visual comfort it is better to position mirror balls towards one side of corner of a room.