Disney's NextGen RFID FASTPASS bracelet has been listed on the government FCC website today, including an image of what it looks like (see image below).
The bracelet, called "Magic Band' is battery powered, is designed to be disposable, and includes the now familiar NextGen Mickey logo and what appears to be the wearers name for easy ID in groups. The RFID bracelet will be the driving force behind much of Disney's NextGen initiative, which includes ticketless park entry, ticketless FASTPASS, attraction personalization, touch-to-pay purchasing and more.
A brief desciption of the device from the filing
"The radio of the device, Model MB-R1G1, is a wrist worn arm band that transmits a 2.4 GHz signal to an indoor wireless infrastructure. The PCB assembly is potted in plastic and completely overmolded with thermal plastic polyurethane. The band has no on off switch and is powered with a non-replaceable coin cell. The PCB assembly also includes a passive UHF RFID tag radio and a passive HF RFID tag radio."