MIC/LINE: 2-channel mono microphone/audio independent input, treble and bass adjustment, LCD display and function buttons, 3.5mm jacks for monitoring via headphones. Complete Set: This 4-channel mini audio mixer comes with 2 wireless microphones (built-in receiver 50 meters), features USB 48V phantom power supply, and the interface can be PC, the device for Android, laptop, game console, microphone, guitar, and those can be mixed together by users. This set can meet the needs of home music recording, internet radio, Karaoke, etc. Plug and Play: Use a computer, USB AC/DC power plug, direct power supply for charging. Built-in universal drive, plug in and install it automatically. Easy to use. Powerful Audio Mixer: This audio mixer supports MP3, WAV, lossless APE, FLAC and other audio formats, recording via USB, connecting to computer to play music recording, individual +48V phantom power supply and UHF switch. Wireless Pairing Function: This audio mixer features wireless pairing function, and it can play your favorite music via wireless pairing connection. This lightweight mixer can be directly connected to the PCs USB port for powering. No extra power required. Specifications: Channel equalizer: 2 frequency bands (high and low) Channel: 4 channels Phantom power: DC 48V Bluetooth function: Yes USB playback: MP3, WAV USB recording function: Yes Application: recording, web broadcasting, karaoke Channels: 2 mono + 1 stereo USB power supply (DC 5V): computer/power adapter/power bank Built-in sound card: can be directly connected to a USB computer without a driver. USB playback: MP3, WAV, lossless APE, FLAC Recording: via USB or PC Effect: delay + repeat. Microphone frequency: 740-750HMZ Packing List: 1*Audio Mixer 2*Wireless Microphone (battery Not Included) 1*USB Data Cable 1*User Manual Notes: Due to the lighting effects and shooting angles, the color of the item and that shown in the picture might have a nuance. Due to manual measurement, there might be a tolerance in the product size.