A. Active Subwoofer China B. USB/SD, FM radio C. Remote ... HOT! 5.1 Active Subwoofer China Guangzhou Specifications: 1. Power (RMS): 50W(woofer) + 15W(satellite)*5 2. Driver units: ... karaoke function 8. MDF wooden cabinet for subwoofer; plastic satellite speakers9. Usage: easy connection with USB, SD/MMC ... card, FM, PC, laptop, DVD, VCD, CD, TV, MP3/4, mobile phone, and other audio devices10. Package ...