Features: Support common or earphone, microphone hole. Microphone recording and Karaoke function,with LED indicator light shows the working Advanced digital technology.Multi-channel technology realizes dynamic sound. Dynamically rotating sound field. Freely switchbetween and headphonemode. adjustment function of analogspeaker position. Convert analogsignal (microphone and , music, TV, broadcast signal, etc.) into digital signal and save function. Specifications: Chip: HFR8103 Interface:USB Material:ABS Size: approx 5.1CMX2.2CMX1.2CM/2x0.87x0.47in for :USBpure digital sound output,enjoy virtual tracks Support : for /2000/2003/XP/Win7Linux/WinCE(5.0 6.0)/Android2.1, 2.2, 2.3, 4.0) Features:23 acoustic field for protection modes, 16 rhythm for 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. Package includes: 1 PC USB to 3.5mm Adapter