I think this was intended as a Tattoo DC Adjustable Power Supply.
I bought it to use as a back up bench power supply.
I only used it a couple of times hence the sale.
It has two output sockets that can be set to different voltages and switched.
It also has a footswitch socket ( foot switch NOT supplied)
Its adjustable from 1.5-18volts with a Digital readout display
It is rated at 1.5 amps.
Works well.