1. 7.1 channel: This product uses multi-channel technology supports 2-channel analog 7.1 channel realizes dynamic sound and provides dynamic rotating sound field. 2. USB 2.0 interface: This product has a USB 2.0 interface plug and play can replace the traditional sound card. 3. Free switching function: This product supports the free switching function of the earphone and speaker mode which can simulate the free adjustment of the speaker position and is more convenient. 4. Mixer function: This product supports the mixer function can adjust the output level freely and bring you different hearing enjoyment. 5. High performance: This product can convert analog signals (line signals of microphone and CD MP3 TV tape recorder etc.) into digital signals and save functions. It supports 16 rhythm preset modes and 23 sound field preset modes.