Power plug specification: 55X2.1mm. Amplifier power option: supports a 12V power supply. Product pairing: a pair of 26inch passive speakers. Supports connection to mobile phones, computers, MP3 players, and set boxes. Controls: power switch, bass adjustment, volume adjustment, treble adjustment. Key benefits Simple 12V powered setup using a standard power supply. Flexible compatibility with common devices such as mobile phones, computers, MP3 players, and set boxes. Intuitive tone control with separate bass and treble adjustment for tailoring sound to content. Pair of 26inch passive speakers provides scalable audio presentation when used with the amplifier. Use scenarios Home multimedia listening: connect a phone or computer to enjoy music, videos, or games with adjustable bass and treble for preferred sound. Small room presentations or classrooms: use for clear audio from a set box or MP3 player during lessons or meetings, with straightforward power and control. Small gatherings or casual events: provide amplified sound from a source such as a set box or MP3 player for backgrounds music or smallscale demonstrations.