Philips MMS2143B/94, 2.1 channels, 40 W, Universal, Black, FM, 1-way Philips MMS2143B/94. Audio output channels: 2.1 channels, RMS rated power: 40 W, Recommended usage: Universal. Satellite speaker type: 1-way, Satellite speakers RMS power: 10 W, Satellite speaker dimensions (WxDxH): 105 x 80 x 170 mm. Subwoofer RMS power: 20 W, Subwoofer driver diameter (imperial): 12.7 cm (5"), Subwoofer dimensions (W x D x H): 160 x 240 x 260 mm. Power source: AC. Connectivity technology: Wired & Wireless