Artsound DC301. Tweeter size: 25.4 mm, Woofer size: 133.4 mm. RMS rated power: 40 W, Peak Music Power Output (PMPO): 80 W, Frequency range: 65 - 20000 Hz. Weight: 4.25 kg. Type: In-wall/On-wall/In-ceiling speakers, Dimensions (WxDxH): 155 x 70 x 245 mm, Audio output channels: 2.0