2.1CH Bluetooth 5.0 Stereo Amplifier. Features buttons to switch the previous/next song. The Bass & Treble buttons are easy to use to meet your different needs. U-disk input for convenient and portable use. Audio Input: U-disk/ Bluetooth/ RCA. Audio Output: Powered Subwoofer + Passive Speakers. Support MP3/WMA/APE/ FLAC/WAV U-disk audio input, up to 32GB capacity. Adopting classic TDA7498E chip to get clear and clarity sound without any audible noise even at high output. Advanced circuit design ensures Hi-Fi sound, compatible with iPhone/Android, iPod, iPad, PC, Laptop, TV, DVD, etc. 160Watt x 2(DC19-35V, 98dB SNR, 0.05% THD), included high quality 24V/4.5A power supply enough to drive most passive speakers and powered subwoofer. What you Get: BL20C Bluetooth amplifier x1, User Manual x1, Power Adapter x1(Optional 24V or 32V), AC Cord x1, an 18-month worry-free warranty, and friendly customer service.