Radio shack pa amp.

This is a radio shack pa amp. I don't know much about it, as I got it in a trade, but I hooked it up and it works, and all tested controls are smooth and functional. It has 2 separate mic channels with individual volume controls, a phono/aux channel and 3 tone controls. It has a led level indicator. On the back it has multiple ohm speaker connectors and a 70 volt output. It has stereo phono connectors and stereo cd/aux connectors and a mix bus connector. It has a power outlet on the rear. It is also capable of 12v operation. I think this would be well suited for a background music/page system. I am asking $45 or best offer, trades considered.