The colorful bands are key to the FastPass+ system at the resort that allows guests to secure times at theme park attractions, including rides, shows and parades in advance. Guests staying at select Disney World resorts have been part of the MagicBand testing for months.
Not all passholders have been notified yet. The emails will be "pulsing out over several weeks," Walt Disney World spokesman Rick Sylvain said Wednesday.
A Disney World website says shipping of the bands will start in "mid-March" and that it could take 10 days for the armbands to arrive.
Some analysts estimate that Disney has invested a billion dollars in the MyMagic+ project.
Visitors will synch their wristbands to an online account, accessible by the My Disney Experience website or smartphone app. Options include popular rides such as Toy Story Mania at Disney's Hollywood Studios or shows such as "Finding Nemo -- The Musical" at Disney's Animal Kingdom. Guests can also make reservations for spots at fireworks shows or parades, such as the new Festival of Fantasy at Magic Kingdom.
There will be some restrictions on passholders, the notifications say. They can plan seven days of FastPass+ selections within any 30-day period. Those days do not have to be consecutive. A day's worth of FastPass+ attractions must all be with the same theme park.
FastPass+ selections -- or alterations -- can also be made after arriving at a theme park, but availability could be limited.
During testing, visitors have been limited to three FastPass+ attractions per day. The entire system is still considered to be in test mode, Sylvain said.
Passholders can make selections up to 30 days in advance.
Unlike Disney World hotel guests, passholders will not be able to charge purchases onto their MagicBands. People staying on Disney property can make FastPass+ selections up to 60 days in advance. The bands also double as hotel keys.