Features:Headset with Microphone and Volume Control.High quality and fashionable appearance.Soft earmuffs and adjustable hinges for comfortable wearing.Ideal for internet chat， VOIP (voice-over-IP)， computer， gaming， etc.Specifications:Brand: CosonicModel: CT-770Color: Blue/BlackMicrophone specification:Microphone dimensions: 6 (diameter) * 5mmSensitivity: -58dB +/- 3dBDirectivity: Omni-directionalImpedance: 2.2kohmSpeaker specification:Driver diameter: 40mmImpedance: 32ohm +/- 15%Frequency response: 20~20 kHzInput plug diameter: 3.5mmSensitivity (S.P.L): 95dB +/- 3dBCord length: Approx. 1.8m / 5.9ftHeadphone weight: 190g / 6.7ozPackage size: 20.8 * 18 * 8.5cm / 8.2 * 7.1 * 3.3inPackage weight: 276g / 9.7ozPackage list:1 * Headphone