You will need a 3 amp 13.8 volt DC power supply here is a link to the instructions,
http://support.radioshack.com/support_electronics/doc7/7214.htm
Using The CB As A Base Station
Although this CB is designed for mobile use, you can also use it as a base
station. To do so, you need the following items.
12-volt DC power supply (such as Cat. No. 22-504).
Note: Most 12-volt DC power supplies plug into a standard AC outlet to
produce DC power. Before connecting your CB to a 12-volt DC power
supply, read and follow the instructions included with the power
supply.
Base station antenna (such as Cat. No 21-976).
Coaxial antenna cable and connectors.
Note: Your local Radio Shack store carries coaxial antenna cable and
connectors.