Indeed already a bit old but still interesting, attractive effect and reliability given the correct type of device and its low price (easily findable for about 80 € or 40 € New Used)
Simple device was implemented, producing 32 beams moving in range, useful for small mobile disco, to cover a wide area with minimal equipment.
The effects are quite limited and the unit heats up strongly, but these would be in my opinion offset by ease of use, good light output and wide beam coverage, as well as the low price.
It is strongly recommended to use lamps of good brands, and always replace in pairs given that they are in series ...
(A discomobile advise beginners, and anyone looking for a simple effect, cheap and yet powerful and extensive coverage)