Product Description: Professional Stage-Level Mixer Analog Mixer Combined With Digital Sound Card With 4-Channel Input 48V USB Playback Bluetooth 24DSP Live Broadcast Port. Multifunctional and Convenient Mixer Combined with Digital Sound Card Brand New Tuning Sound Effects. Ultra-Low Noise Quality is More Pure High-Fidelity Sound Quality Clear and Bright Vocals. Unique Features of NA4 Mixer: Built-In High-Speed Arm Chip with Unique Processing Technologies such as Low Noise Voice Change Pitch Change Reverberation Delay Electronic Sound Effects etc. Personalized Function Settings Convenient Console Design Give You a Different Tuning Experience Can be Used for Stage Performances Bands Conference Rooms Recording Studios Bars Live Broadcasts etc. Specification: Size: 170*195*50 mm /0.55*0.63*0.16 in (Length x High x Deep) Net Weight: 0.6 kg/1.32 lb Frequency Response: 0.5db/-1.0db(20Hz~ 20khz) Reference Rated Output Level @1khz Gain Knob: MID Input: MIC*2、2REC、PC、2LINE、USB、BT、3.5MINI 0utput: STEREO OUT:2 3.5MINI MAIN PH OUT: MINI LOOP BACK OUTPUT; 2.REC Bus: STEREO:1 Input Channel Functions: HPF (Mono) 80 Hz 12 dB/Octave (CH3 4) EQ High Gain: +15db/-15db Frequency Response: 10khz Ramp Frequency EQ Low Gain: +15db/-15db Frequency Response: 100Hz Ramp Frequency PEAK LED: LED Tums On when The Signal After EQ Reaches 3db Below Distortion Level Indicate The MAIN STETREO Level Knob The Green Light will be On When The Signal After MAIN LEVE Reaches 0db The Red Light Will Be Clipped When The Signal Reaches 0db Below The Distortion and The LED will Turn On and Light Up. Input and Output Level: MIC(-60db)LINE OUTPUT(-40db) Package Contents: 1 x Mixer 1 x Data Cable 1 x Power Plug 1 x English User Manual