A teal Annual Passholder exclusive MagicBand was released for Pandora: The World of Avatar on opening day, May 27th, 2017. Disney Parks Blog has the full details. The band is Limited Edition 5000 and is $32.99. It will most likely make special effect lights and sounds at touch points throughout Animal Kingdom. This is the first ever Annual Passholder exclusive band. This band was only available in the the Animal Kingdom theme park in Riverside Depot and Windtraders, and was never made available for sale online.
The special effects from the band appear to make the sounds of a banshee breathing: