Hi @liufulin, thanks for your query. The Tobii Eye Tracker 5 illuminator operates at a frequency of 33Hz whilst the image sampling rate (which determines how quickly gaze data can be captured) runs at 133Hz
Further specifications can be found @ https://help.tobii.com/hc/en-us/articles/360012483818-Specifications-for-Eye-Tracker-5
Please do let us know if you have any further queries. Best Wishes.