22W×2(L/R)+40W(subwoofer) 2.1-channel output of outstanding sound performance to drive most home, car, marine and outdoor passive speakers and subwoofers Bass volume control to allow separate adjustment of high and low frequency, with heavy bass enhancement, low distortion, acoustically accurate reproduction of music RCA/AUX Inputs, compatible with various devices, such as mobile phone, MP3, MP4, CD player, TV, computer, etc Subwoofer/Bass/Treble Control by knobs for fine adjustment DC 12V 2A power adapter, easy to install and operate, suitable for car, boat, RV, golf cart or at home Designed with main volume, treble, and bass control knobs, it can adjust the sound more finely, making it very interesting and highly playable.