Artsound E3 B. Tweeter size: 19.1 mm, Woofer size: 76.2 mm. RMS rated power: 30 W, Peak Music Power Output (PMPO): 60 W, Frequency range: 70 - 20000 Hz. Weight: 3.5 kg. Type: In-wall/On-wall/In-ceiling speakers, Dimensions (WxDxH): 140 x 205 x 290 mm, Audio output channels: 2.0