IDANCE FREE40 -Watt -Channel Recording Studio Equipment, Pink Lightweight Ergonomic fit 30mm Super bass Speaker Driver Comfortable ear pad for Any outdoor use Compatible with iPhone inline microphone Magnet type: Neodymium, Driver Unit: 30 mm, Impedance: 32 ohms, Sensitivity: 108 dB+/-3dB. Frequency Response: 15Hz~20KHz, Cord Length: 1.5m, Cable Type : PVC, Plug Type : 3.5mm gold plated