These are NOT for use with home tanning beds.
Universal transformers are designed to be used with tanning beds that do not have a plug, such as larger commercial equipment (32 or more lamps). 24 to 32 lamp beds with recepticals that plug in the wall should use the other style transformers.
These are adjustable for many different voltages, up or down, and should be professionally installed and hardwired to both the bed and the incoming power supply.
There are many different kVa ratings available, and we would suggest you instead call us at 1-800-274-1744 if you need one of these ballasts, to insure we get you the right part the first time.