Features: Powerful 2.1-channel output provides immersive auditory experience and effect. Equipped with TPA3255 chip, output stable power to ensures auditory performances. Wireless function, easy to connect to various Wireless devices for wireless Auditory playback. Multiple function board, support Wireless, cored input, USB input and other input method. Auditory output provides clear and dynamic sound, suitable for music enthusiasts and professional users. Easy installsand carry,for auditory projects Specifications: Model: AS21 Size about 141x131x27mm/5.55x5.16x1.06in Chip：TPA3255 Channel：2.1Channel Support：Wireless function Power: 220W+220W+350W Package Includes: 1Set 2.1CH Power Amplifier Board note: Due to problem of light effects,there might be tolerances in product, please understand. Please allow 0-1cm error due to the measurements