Features: * LR main mix * USB digital audio sound mixer * recording function * 2 mono (1 guitar Hi-Z) / 1 stereo input * High quality end equalizer * Built-in 48V phantom power supply * Channel and main mix level display * 2 track recorder returns * Headphone monitoring * +22dBu drive capability output * Mic preamp with extra capacity up to +34dBu * Ultra-low noise amplification design. * Bluetooth/MP3 player/recorder with simple human-computer interface * Digital reverb effect * Metal housing, gold plated XLR, sealed potentiometers and switches * Powered by an external power adapter. * Suitable for small performances, home karaoke, conference control, and teacher speeches. Specification: Name: Audio Mixer Maximum input level: Mic input: +22dBu / Line input: +20dBu Maximum output level: +22dBu Main channel level display: 2LED from signal to peak Input channel level: 1 LED peak display Frequency Response Range: 20Hz to 22KHz ±1dB Common mode rejection ratio (MIC 1KHz): 75dB Total harmonic block loss: 0.05% (channel input to output) Separation (at 1KHz channel mute)80dB Noise Figure (rms 22Hz to 22KHz): Equivalent SNR: -122dBu / Residual Output Noise: -88dBu Mono/Stereo Input Channel Equalizer: Treble, Broom, ±15dB, 12KHz, Bass, Broom, ±15dB, 80Hz Maximum input power: DC5V/1A 5W Mixer size: 150 * 180 * 35mm/5.9" * 7.1" * 1.4" Microphone size: 240*40mm/9.45"*1.6" Packing included: 1 * Audio Mixer 2 * Microphone 1 * USB charging cable Note: 1. Due to manual measurements and slight color variations, please allow 1-3 cm (0.4-1.18 inches) difference to suit different display settings. 2. Due to the light and screen difference, the item's color may be slightly different from the pictures. Please understand.