Power plug specification: 55X2.1mm Power supply: 12V Control buttons: power switch, bass adjustment, volume adjustment, treble adjustment Product matching: a pair of 26 inch passive speakers Compatibility: supports connection to mobile phones, computers, MP3 players, and set boxes Key benefits Simple 12V power setup for straightforward use with compatible equipment Independent tone controls for bass and treble to tailor sound to your room or content Clear device compatibility with common source devices such as phones, laptops, portable players, and set boxes Readytouse with a pair of 26 inch passive speakers for fuller stereo sound What makes it practical Versatile audio solution for home or small office setups Easy to operate with a dedicated power switch and intuitive tone controls Designed to work with standard consumer sources to enhance multimedia playback Use scenarios Desktop computer or laptop audio enhancement: connect a phone, MP3 player, or set box to the amplifier and pair with 26 inch passive speakers for improved music, movies, or games Living room TV or set box audio: use the amplifier to drive the 26 inch passive speakers for clearer dialogue and richer sound from your TV content Small gatherings or presentations: connect a mobile device or computer to the amplifier, adjust bass and treble to suit the room, and deliver clearer audio to multiple listeners Notes The product is specified to pair with a pair of 26 inch passive speakers No additional accessories or materials are described beyond the stated specifications and matching speakers