Stereo Headset Flexible Boom Microphone with In-Line Volume Control and Mic Mute Lightweight Comfortable padded earphones ideal for music listening, instant messengers and multimedia Flexible microphone boom for hands-free communication Low-profile, compact design with adjustable inline volume control Durable cable with nylon mesh protective jacket Specifications Headphones: Frequency response: 20 Hz – 20 kHz Impedance: 32 Ohms Sensitivity: 103 dB S.P.L at 1 kHz Input connection: 3.5 mm plug Cable: 2.5 m (8 ft.) Microphone: Type: omni-directional electret condenser Frequency response: 30 Hz – 16 kHz Impedance: low Sensitivity: -58 dB ± 3 dB Output connection: 3.5 mm plug (Stereo Headset 1/8" Mic and Speaker Cable ends) Only $ 9.98 More, Add USB Audio Adapter for Easy 1 Plug Installation for Laptop Users