OmniSistem Lighting is best known for their wireless battery powered "Passport" par system. Their unique battery pars offer a mix of RGBA and RGBW LED's.
Believe it or not, this is actually better than all RGBAW LED's in some cases. The reason is that quad color LED's are brighter (per color) than 5-color LED's with the same power rating. So depending on the color being mixed, this unique design may be better than going with all 5-color LED's. Plus, it can save you some money!