In-Ear Stereo Headphones. Features: The perfect fit reduces unwanted exterior noise so that you can enjoy your music without being disturbed. Silicone earbuds in three different sizes (S, M, L). Connection: 3.5 mm Jack Plug. Cable Length: 1.2 m. Speaker Diameter: 10 mm. Frequency Range: 20 Hz - 20 kHz. Impedance: 32 Ω. Sensitivity: 96 dB/mW. Material: plastic. Colour: Black.