four channel mixer, compact sudio system for studio recording, DJ equipment, live online, etc.    can be used outdoors and indoors, portable and convenient to use.    Use of USB input to connect devices to play MP3, MP3 part with independent volume control.    3-band EQ on all channels, HI controllers high frequency range, medium control increases / cuts midrange frequencies, and low control increases / decreases the gain of the bass range.    Built-in reverberation delay effect, 48 V phantom power supply and BT function.        Material:ABS    colour:black    Noise: -80dB    Frequency Response: 20Hz-20kHz ±0.5db    THD : ≤0.03% @ 1KHz    SNR: ≥82dB    Max Input Level of Mic: 16dBu    Max Input Level of Circuit: 30dBu    Max Input Level of Stereo: 20dBu    Headphone Output: 200Ω/300mW    Other Output: +20dBu    Item Size: 20 x 24.6 x 5.8cm / 7.87 x 9.69 x 2.28in    Item Weight: 970g / 34.22oz    110-220V universal voltage, Available in all countries        Package Contents:    1 x audio mixer