The is one of a growing population of canyoneering descenders that are essentially figure eights with a multitude of horns and/or ears that provide a variety of friction arrangements by looping the rope around various combinations of horns. I find this idea to be rather humorous - how many different ways to rig a device does one need?
The value and need for horns strongly depends on the rope being used. On stiff mud-covered PMI pit rope, descending with an eight sometimes requires hand-feeding. At the other extreme, rappelling on clean, thin, polyethylene "strings" can be bloody fast, and one can appreciate almost anything that provides more friction.
To be fair, I see nothing fundamentally wrong with the concept of multiple horns, I just don't think their value offsets the increases in device size and complexity. One can debate whether adding horns to a constant-friction device is a better approach than using a variable friction device (or even a constant friction device that provides the right amount of friction for the user), but it really boils down to personal preference. I prefer to K.I.S.S.