1、Plug and play, connect mixer to mic, guitar, bass, keyboard, electronic drum sets, and then attach to smartphone/tablet(as power supply); each has independent volume control. 2、Just connect headphone/amp to the audio mixer, push “INOUT MONIOTR” button, to well monitor(volume adjustable, turn to on: dry and wet sound, turn to off: only wet sound). 3、Wire MP3/MP4 or drum machine to LINE IN; turn \"CENTER CANCEL\" on to reduce the vocal volume of playback music, making your sound prominent. 4、Can connect device to \"RECORDING\", real time output audio to smartphone, great for live stream; work with guitar effect pedal similar software, to create music, suitable for composing songs. 5、Portable audio equipment, features sleek, simple, nice, fit for various scenes, lightweight, compact, not so big, space-saving, very convenient to anywhere. Features: Plug and play, connect mixer to mic, guitar, bass, keyboard, electronic drum sets, and then attach to smartphone/tablet(as power supply); each has independent volume control. Just connect headphone/amp to the audio mixer, push “INOUT MONIOTR” button, to well monitor(volume adjustable, turn to on: dry and wet sound, turn to off: only wet sound). Wire MP3/MP4 or drum machine to LINE IN; turn "CENTER CANCEL" on to reduce the vocal volume of playback music, making your sound prominent. Can connect device to "RECORDING", real time output audio to smartphone, great for live stream; work with guitar effect pedal similar software, to create music, suitable for composing songs. Portable audio equipment, features sleek, simple, nice, fit for various scenes, lightweight, compact, not so big, space-saving, very convenient to anywhere. Specifications: Material: Plastic + Electric Components Color: White Power: USB Type-C 5V Current Consumption: 50mA Audio Resolution Sampling: 48KHz/16bit Dimensions: 124*91*34mm / 4.88*3.58*1.33in Net Weight: 149g / 5.25oz Package Size: 16*13*5.5cm / 6.29*5.11*2.16in Package Weight: 255g / 8.99oz Input Impedance And Sensitivity Mic: 2.2KΩ-45dBV Guitar: 1MΩ-20dBV INSTRUMENT: 10KΩ-10dBV LINE IN: 10KΩ -10dBV Output Level: MONITOR: 0dBV Note: Audio mixer only, other accessories in the pictures are not included. "CENTER CANCEL" function only supports LINE IN 1, not LINE IN 2. Please read the user manual carefully for more information before usage. Due to lighting or other reasons, the picture and material object may slightly differ. Due to manual measurement, there may be deviation, please in kind prevail. Packing List: 1 * Audio Mixer 1 * USB Type-C Cable 1 * User Manual 1 * Audio Mixer 1 * USB Type-C Cable 1 * User Manual