Power plug: 55X2.1mm Amplifier power: 12V power supply Speaker pairing: Includes a pair of 26inch passive speakers Connectivity compatibility: Supports connection to mobile phones, computers, MP3 players, and set boxes Controls: Power switch, bass adjustment, volume adjustment, treble adjustment Key benefits Clear amplified audio from a simple twopart system consisting of an amplifier and a matched pair of passive speakers Wide device compatibility for easy use with mobile phones, computers, MP3 players, and set boxes Tone adjustment with dedicated bass and treble adjustments plus volume control to suit content and room 26inch passive speakers provide a larger sound footprint than compact speakers, suitable for home or small venue use Use scenarios Desktop computer setup: enhance music, movie, or game audio from a laptop or desktop PC with adjustable bass, treble, and volume Living room TV or set box: improve dialogue and soundtrack quality for movies and TV programs using a connected device Small gatherings or presentations: play music or audio from a mobile phone or MP3 player with straightforward amplification and control