Artsound MDC501. Tweeter size: 12.7 mm, Woofer size: 133.4 mm. RMS rated power: 35 W, Peak Music Power Output (PMPO): 70 W, Frequency range: 85 - 20000 Hz. Weight: 2.75 kg. Type: In-wall/On-wall/In-ceiling speakers, Dimensions (WxDxH): 212 x 70 x 212 mm, Audio output channels: 2.0