Pro Tools supports up to 4% pull up and pull down, with support for an additional 0.1% up or down. Separate rates can be set for session audio and video (when video has been imported or captured into the session).
When referring to 4% pull up and pull down, the precise percentages used in pull ups is 4.167%.
While a Synchronization peripheral is not required in order to use the extended pull up and down options provided in Pro Tools, a Synchronization peripheral is the only device that can be controlled from within Pro Tools, and that recalls and restores pull factors automatically when a session opens. Other synchronization peripherals must be configured manually.