Elac BS 52.2. Tweeter size: 25 mm, Woofer size: 110 mm. RMS rated power: 40 W, Peak Music Power Output (PMPO): 60 W, Frequency range: 65 - 25000 Hz. Weight: 2300 g. Type: In-wall/On-wall/In-ceiling speakers, Dimensions (WxDxH): 136 x 165 x 210 mm, Audio output channels: 1.0