These high quality audio/video amplifiers give you ability to distribute low-noise, low-distortion signals to four destinations. Amplified, broadband circuitry eliminates signal loss and assures true one-to-one ratio, low noise, low distortion, unity gain L/R audio and video distribution. The amplifiers are capable of supplying enough signal for cable runs of up to 150". They can also be looped or cascaded for additional runs. Includes AC adapter. Operational from 12-15 VDC with a 2.5 x 5.5mm center positive DC plug.