RICH INTERFACE : There're Condenser microphone ×2, headset ×1, earphone ×1, accompany, live ×2, type-C OTG/PC Live ×1, 6.35mm Dynamic microphone ×1 and charging port ×1, which make the podcasting and recording easier. BLUETOOTH & PORTABLE : Thanks to the 1200mAh battery, you needn't keep F999 sound board plugged in and use it outdoors. Also, F999 supports bluettoth connection to your phone or computer. DENOISE FOR LIVE STUDIO : Whether you want to highlight or eliminate the vocals or other effects in your streaming, you can make it by using buttons of eliminate, mute, internal play, ducking, denoise, BT. F999 NEW GENERATION : Conpared to old version F998, we redesigned the positions of buttons and knobs and enhanced the adjustment of treble, mid and bass. You can make adjustment slightly by rotating knobs, achieving clear treble, sweet midrange, deep bass. F999 DJ mixer for beginners : This audio mixer has 7 knob and 2 push button adjustments, 7 scene modes and 4 voice changer, 16 effects and other mixer options, supporting double channels, which makes live stream more entertaining.