?Power/ Phantom Power Switch?LINKFLEX AD3 audio mixer supports 48v phantom power (provided by 9V battery),which can avoid interruption of recording due to low power. ?Smartphone /Mic Monitor Switch?With 3.5mm headphone output, this preamp adapter can monitor the sound of the Smartphone or Micphone.“Phone” means Playback the sound of smartphone and “Mic” means Real-time monitoring the sound of the microphone. ?Universal for Smartphones and Cameras?LINKFLEX AD3 mic audio mixer is an easy solution to connect any professional microphones or instrument to iPhone,iPad,Android Smartphones and Camcorders and DSLR Cameras. ?Support 2-Channels Audio Input?Comica LINKFLEX AD3 mic audio preamp supports mono or stereo audio input.You can record two separate tracks at the same time.NOTICE:When there is only one group microphone connected with this device, then you have to set the M/S to Mono mode. ?XLR/3.5mm/6.35mm Adapter Interface?LINKFLEX AD3 audio adapter supports XLR/3.5mm/6.35mm audio input.Please insert the microphone or instrument plug into the corresponding jack for shooting videos.NOTICE:The 6.35mm and XLR are in the same jack and cannot be used at the same time.