Type: On-Wall/In-Wall 3.7" Shallow Profile Speaker, Design: 2 Way, Driver Size : HF 1" dome tweeter, LF 3" woofer, Amplifier Power: 40 - 80 watt, Nominal Impedance: 6Ω, Sensitivity : 80dB, Frequency Response : 80Hz - 20kHz, Dimensions (WxHxD):210mm x 285mm x 93mm, Mounting Options: Key-hole bracket fitted, Accessories:IWO WB 61 (In wall bracket) sold separately.Weight:3kg