The Shooting Star 225 Plus Linear Amplifier is a versatile and powerful unit designed for various radio communication needs. With support for SSB, FM, and AM modes, this amplifier offers a signal gain of 20dB and a power output of 225pep. It features 40 channels, one input, and one output, making it a reliable choice for ham radio and amateur radio enthusiasts looking to enhance their communication capabilities. This model, known as the 225 Plus, is a top choice for those seeking high-quality amplification in a compact and efficient package. This unit has been in storage for 3+ year. Powers up but no further testing. Sold as is.