Terk Technologies AC Adapter 1183-12-100D - 120V AC 60hz in - 12V DC 100mA Out

Good Condition, See Pictures and Description for Details

This Terk AC Adaptor will Transform the 120V, 60hz, Alternating current coming from a US Standard outlet near you into 12 Volts of Direct Current at 100mA. 

I'm not sure what this power supply is for exactly, but Terk used to make FM Antenna systems and this is most likely for one of their products.