Features and benefits Power requirement: amplifier supports a 12V power supply. Included matching components: a pair of 26 inch passive speakers. Wide device compatibility: supports connection to mobile phones, computers, MP3 players, and set boxes. Connector specification: power plug size is 55X2.1mm. User controls: power switch, bass adjustment, volume adjustment, treble adjustment. Why this matters Flexible setup with a standard 12V power supply and a matched speaker pair enables straightforward stereo playback with minimal wiring. Compatibility with common devices allows use across multiple environments such as mobile, computer, and set box sources. Sound tuning options give you control over the listening experience, letting you adjust bass, treble, and overall volume to suit content and room. Simple control interface with four buttons supports quick adjustments without complex menus or additional equipment. Use scenarios Home entertainment center: connect a TV or set box to enjoy enhanced audio for movies, shows, and streaming content with adjustable bass and treble. Desktop or workspace: pair with a computer or MP3 player to improve music, videos, and presentations from a compact system. Small shops, classrooms, or offices: provide background music or announcements with straightforward volume and tone control for comfortable listening levels.