Consists of two active RF matching amplifiers, one for AM and the other for FM and Wx bands It is equipped with transit and reverse voltage protection Surface mount board is conformal coated to protect the components from moisture Case is a custom aluminum design with strain relief The system uses state-of-the-art construction and is protected from transient voltage and reverse battery connection It has been extensively tested and benchmarked and no other product tested comes close to its performance Comes with complete instructions and everything needed for installation For 2014 and newer Harley-Davidson models with the European style connector use the Antenna Concepts adapter 162-059