Features: 100% brand new and high quality Support common speaker or earphone, microphone hole. Microphone recording and Karaoke function,with LED indicator light shows the working status. Advanced digital technology.Multi-channel technology realizes 5.1 channel dynamic sound. Dynamically rotating sound field. Freely switch between speaker and headphone mode. Free adjustment function of analog speaker position. Convert analog signal (microphone and CD, music, TV, broadcast signal, etc.) into digital signal and save function. True universal plug and play. Use the USB port and use it directly. Package Includes: 1 PC x Mini USB to 3.5mm Audio Adapter Specifications: Chip: HFR8103 Interface:USB Material:ABS Size: approx 5.1X2.2X1.2CM/2.0x0.87x0.47in Compatible with :USB 2.0 pure digital sound output,enjoy virtual 5.1-channel audio tracks Support System: Windows /2000/2003/XP/Vista/Win7/Linux/WinCE(5.0 6.0)/Android (2.1, 2.2, 2.3, 4.0)/Mac. Features:23 acoustic field protection modes, 16 rhythm protection modes note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-2mm error due to manual measurment.