The SC-HT545W offers great sound with rear wireless convenience. Audio signals are transmitted between the main unit and rear amp by radio waves and then wired to the surround speakers, so there's no need for cables. This is especially convenient in a room with hardwood floors, where there is no good way to hide cables. The 2.4-GHz wireless system combines Advanced Adaptive Frequency Selection using a bi-lateral authentication system, to minimize interference. In line with the growth in popularity of MP3 players, all these models include a Music Port. This enables you to link up any portable audio player and listen to the music stored on it through your home cinema system. The 3.5mm cable plugs into your portable audio player and the music port and then allows all the tunes to be played back. The digital re-mastering technology ensures high quality MP3 reproduction, and will bring life to your portable audio player like never before. The cinema system features Advanced Progressive Scan, which delivers perfect clarity to flat panel plasmas and LCD screens. With features such as Cinema mode, which reduces glare, softens resolution and improves visibility in dark scenes and a Dialogue Enhancer, which boosts the centre channel speaker by 6dB to make movies come alive, these systems effortlessly deliver the full effect intended by the film's director.