2XLR inputs low-noise preamp with 48V/12V phantom power. "Riggy-Assist" means that it has added features to the Riggy-Micro to assist with cameras which do not have headphones, meters, or manual control. It is Riggy in that it has numerous mounting and accessory options. Audio output bracketing for camera overload protection. Alkaline/LiPolymer operation. Selective power-down mode.
Camera Overload Protection - Audio Output Bracketing: The Riggy-Assist incorporates Audio Output Bracketing for camera overload protection. All of the microphone signals are combined, (by setting the MONO/STEREO switch to MONO), and sent to both the the left and right output channels. The copy on the right output channel is then attenuated to a safe lower signal level (about 16dB lower, by turning ON the Rpad switch). So, if you blow out the main audio channel on the left, you have a back up that you can pull from in post on the right.
This approach has advantages over other types of overload protection, such as limiters. First, Audio Output Bracketing consumes no power from the battery, and also adds no noise or distortion to your audio. Second, every camera gain setting (and, every different camera) will have a unique signal level at which clipping will start to occur. So, if you were to attempt to use a limiter approach, you would need to re-calibrate the point at which the limiter would kick in for each different gain setting of the camera (and, each different camera).
Be careful, because not all manufacturers even provide you with the ability to set the limiter threshold setting. Audio Output Bracketing needs no calibration for different cameras or different camera gain settings. The backup channel is always there at ~16dB lower signal level, regardless of the camera or camera gain setting.