Dynamic mono earphone with plastic holder and ear cartridge, adjustable in height for an optimum fit. It feature1 m connection cable and 3.5 mm mono plug. Headphone driver: ferrite, Max. input power: 100 mW, Transmission range, headphones: 100-18000 Hz, Nominal impedance, headphones: 32 Ω, Headphone sensitivity: 100 dB/mW, Weight w/o cable: 22 g