Yamaha MCR-B020 30 W Micro Component Speaker feature a 10cm (3-7/8") drive unit that employs a large-diameter magnet for enjoying music with rich bass tones and clear mid and high ranges. Bass sound is deep and robust, thanks to a large-volume cabinet that acts like a bass drum. Enjoy wireless playback from your smartphone, tablet or PC effortlessly with Bluetooth technology. In addition to the CD player, USB and FM/AM radio, it has an AUX-In terminal for connecting a PC or Digital Audio Player.