Feature:1. 4-channel compact size mixing console designed for home studio recording, network live broadcast, karaoke, etc; 5V low voltage power supply design, can be powered by computer, power adapter or 5V power bank via the USB 2.0 jack or USB jack.2. 2 TRS \u0026 XLR combined mono inputs for connection of microphone, instrument or other audio device; Stereo/mono TRS inputs for connection of an audio source with line signal level; 3.5mm AUX input jack for connection of smartphone or other device to use applications to trigger sound effects or background music.3. Stereo TRS outputs for connecting another mixer, amplifier or recorder; 6.3mm PHONE jack for connection of stereo headphone, and 3.5mm headset connection with headset microphone input jack and headset headphone output jack can avoid unnecessary noise.4. CH1 \u0026 CH2 have GAIN, 2-band EQ(HIGH \u0026 LOW), PAN and LEVEL controls; the CH1 with +48V phantom power for condenser microphone; CH3 \u0026 CH4 with GAIN switch and LEVEL control; TO PC slide switch can select the sound to send to the computer(DRY CH1-2/ INPUT MIX/ LOOPBACK).5. When connecting the mixer with a computer using the included USB 2.0 cable, the computer suppliers power to the mixer, at the same time, audio data can be sent between the mixer and computer.Specification:Features:4-channel compact size mixing console designed for home studio recording, network live broadcast, karaoke, etc; 5V low voltage power supply design, can be powered by computer, power adapter or 5V power bank via the USB 2.0 jack or Micro USB jack.2 TRS & XLR combined mono inputs for connection of microphone, instrument or other audio device; Stereo/mono TRS inputs for connection of an audio source with line signal level; 3.5mm AUX input jack for connection of smartphone or other device to use applications to trigger sound effects or background music.Stereo TRS outputs for connecting another mixer, amplifier or recorder; 6.3mm PHONE jack for connection of stereo headphone, and 3.5mm headset connection with headset microphone input jack and headset headphone output jack can avoid unnecessary noise.CH1 & CH2 have GAIN, 2-band EQ(HIGH & LOW), PAN and LEVEL controls; the CH1 with +48V phantom power for condenser microphone; CH3 & CH4 with GAIN switch and LEVEL control; TO PC slide switch can select the sound to send to the computer(DRY CH1-2/ INPUT MIX/ LOOPBACK).When connecting the mixer with a computer using the included USB 2.0 cable, the computer suppliers power to the mixer, at the same time, audio data can be sent between the mixer and computer.Specifications:Model: AGM04CH1 XLR: 1.5mV/2.2k ohmCH2 XLR: 2.5mV/2.2k ohmCH1 Jack: 10mV/12k ohm(line)CH2 Jack: 15mV/240k ohmCH3/4: 550mV/22KohmAUX IN: 280mV/10KohmOutput Level: main mix out--max.6.5V, stereo out-- 1.0V, phone/monitor out-- max. 6.5VFrequency Range: 10-33000Hz, +/-3dBTHD: <= 0.05%Low Range: ±15dB/80HzHigh Range: ±15dB/12kHzHeadphone: Impedance: >=8 ohmPhantom Power: +48VPower Supply: USB 5V 500mAOperating System: Windows 2000/XP/7/Vista or higher; Mac OS 9.1/ OS X or higherItem Size: 12.8 * 19.2 * 4.7cm / 5.04 * 7.56 * 1.85inItem Weight: 760g / 1.7lbsPackage Size: 24 * 17.5 * 10cm / 9.4 * 6.9 * 3.9inPackage Weight: 1015g / 2.2lbsPackage List:1 * Mixing Console1 * USB Cable4 * Foot Pads1 * Users' Manual(English & French & German & Italian & Spanish & Japanese)Package List:1 * Mixing Console1 * USB Cable4 * Foot Pads1 * Users' Manual(English & French & German & Italian & Spanish & Japanese)