Overview: Loudhailer diameter:40mm Frequency range:20-20000 H Zsensitivity:110 d Blmpedance:32 ohm Cable length: Approx.1.8M (Volume Control) Maximum Power input:100m W Pulg (MM):3.5 Stereo High Resolution stereo sound Drawing processed surface of the shell. metel felling clip of moderm design. Hi-fi Speakers make the high frequency sound clear & clasp andintermediate frequency Sound durable & reliable Bending resistance high guality cable make it perfect.