Artsound G4 B. Tweeter size: 19.1 mm, Woofer size: 101.6 mm. RMS rated power: 25 W, Peak Music Power Output (PMPO): 50 W, Frequency range: 70 - 18000 Hz. Weight: 3 kg. Type: In-wall/On-wall/In-ceiling speakers, Dimensions (WxDxH): 155 x 151 x 238 mm, Audio output channels: 2.0