The phrase "further details" means additional or more specific information about a particular topic. It is often used to indicate that there is more information available, but it may not be explicitly stated what those further details are.
For further details for each individual lesson then do view each lesson individually. (tes.com)
Please contact the schools you are interested in for further details on how they define sibling for the purpose of sibling preference. (myschooldc.org)
Choose from those listed below for further details about each PADI dive course. (baliocean.com)