Retaining all the features of its parent, the MixerFace R4 – a mobile recording interface for smartphones, tablets and computers – CEntrance's MixerFace R4R model adds onboard “one-button record” stereo micro-SD card recording for further in-the-field/on-the-road versatility and recording redundancy. Additionally, it enables you to stream audio via the phone, while recording a local copy to its internal SD card recorder, a level of flexibility unmatched by any existing field recorders.