This collection of articles is for the Readiband 4 (released 2015-2016)
Any article starting with "Readiband 4" will help you pair, deploy, and manage these Readibands. If you come across articles that don't specify the Readiband in the title, they're focused on the Readiband 5 (touchscreen device).
Articles on sleep metrics and the Web app don't apply to a specific Readiband. To learn about using sleep metrics to manage fatigue, try this collection.