Features: Portable 4-channel Mixer: Multi-functional 4 channels mixer console with sound card function, supporting BT and USB connection, 3.5mm headphone output, microphone and phone jack. Mono channel input jacks MIC/LINE is for XLR jack and phone type jack, stereo input can meet the needs of electronic keyboard and sound equipment. Control the Sound: The mixer is engaged with main input gain, high and low 2-band sound adjustment, plus delay and repeat effect. Record Function: Equipped with set of record ports for stereo main sound output connection plus recording interface. +48V Phantom Power: The built-in +48V phantom power is applicable for power supply to condenser microphone directly. Wide Application: Small and lightweight audio mixer, it can meet various needs such as live streaming, music production, karaoke and more occasions. Specifications: Model: B4-LIVE Color: Black Material: Plastic Power Adapter: EU plug, Input: AC100~240V, Output: 5V/2.1A --Input Channel Sensitivity Mic: -60dB Stereo Channel Output: -40dB Output: Max.4V Signal to Noise Ratio: -80dB Parametric EQ: HI ±15dB/12kHz, LOW ±15dB/60kHz Dimension: 19 * 17.5 * 6cm / 7.48 * 6.89 * 2.36in Net Weight: 535g / 18.87oz Package Size: 22.5 * 21.5 * 8.5cm / 8.86 * 8.46 * 3.35in Package Weight: 750g / 26.45oz Packing List: 1 * Audio Mixer 1 * 3.5mm TRRS to TRRS Cable 1 * USB Cable 1 * Power Adapter 1 * User Manual