In-Ear Stereo Headphones. Features: Integrated microphone. Integrated remote control allows you to take and end calls, to activate the voice control and to individually control your music: play/pause/title forward/title backward (if supported by the phone). The perfect fit reduces unwanted exterior noise. Silicone earbuds in three different sizes (S, M, L) for an individual, perfect fit. The gold-plated coating of the plug ensures secure signal transmission for improved audio quality. Connection: 3.5 mm Jack Plug. Speaker Diameter: 10 mm. Frequency Range: 20 Hz - 20 kHz. Impedance: 32 Ω. Sensitivity: 95 - 99 dB/mW.