Specification: Speaker size: 50mm Sensivitity: 105+/-3dB Frequency range: 20 Hz-20KHz Microphone: 6.0x 2.7mm Microphone sensitivity: -38+/-3dB Directionality: omni-directional Cable length: 2.1M +/-0.15 LED working voltage: DC 5V +/- 5% Headset jack: USB+3.5mm 4 Pin System support: The 32-bit and 64-bit Win 7/Win8/Win8.1/Win 10/XP/Mac/Linux/IOS/Android