Description: -The mixer is quipped with a built-in 48V+ phantom power supply for direct power supply of capacitor microphones.  -The mixer is portable and light-weight, can be directly connected to the USB port of PC for power supply without extra power supply. It can be operated by connecting the computer with USB for power supply, saving the trouble of using external adapter. You can also use mobile phne power supply or USB adapter for power supply.    Features: 1.LR main mix;  2.USB digital audio sound card;  3.Recording function;  4.2 mono (1 guitar high impedance) / 1 group stereo input;  5. High-quality two-band equalizer;  6.Built-in 48V phantom power supply;  7. Channel and main mix level display;  8.2 Track Recorder Return;  9. Headphone monitoring;  10. + 22dBu drive capability output;  11. Microphone preamp with excess capacity of + 34dBu;  12. Ultra-low noise amplification design;  13.Bluetooth / MP3 player / recorder with simple human-computer interaction interface;  14. Digital Reverb Effect;  15. Metal case, gold plated XLR, sealed potentiometer and switch;  16. Powered by external power adapter;    Specification: Name:4-channels mixing console audio mixer;  Color:Orange;  Material:ABS;  Total harmonic distortion:≤0.1%;  Frequency response:20hz-20Khz±5dB;  Noise:≥-80dB MAX;  Output:4V / max;  Parameter EQ:Hi: 12KHz ± 15db;Low:80Hz/± 15db;  Size:186x162x66mm;    Package Include: 1 x Audio Mixer;  1 x Power Cable;  1 x User Manual