1. Panasonic ideas for life RP HV108 Stereo Insidephones Volume control Frequency response 10Hz 25kHz Consistent great performance with strong sound Features Drive Unit diam in mm 14 8 Impedance Ohm 1 kHz 17 0 Sensitivity dB mW 104 0 Max Input mW 40 0 Frequency Response Hz kHz 20Hz 20kHz en JP Cord Length m 1 2m In Cord Volume yes Weight g without cord 6 0 MiniPlug 3 5mm yes Plug Type en JP Nickel Magnet Type en JP Neodymium Mobile Phone Receiver