The Radio Shack Cable High Gain Signal Amplifier Adjustable Model 15-1112B is a VHF in-line amplifier manufactured in 2010. It features a signal gain of 20dB and is compatible with cables and antennas. This amplifier has one input and one output, with audio inputs in Coaxial RF/F-type and suitable for various devices. The RadioShack brand ensures quality and reliability in this essential TV and video accessory.