Duonamic Eleviia (with Gymnastic Rings) Unboxing & Review - Worlds Smallest Portable Pull-Up Bar
Check out this in depth review of the Duonamic Ultimate rings travel package from Calisthenicsworldwide.
Also check out Calistenicsworldwide Blog post
https://calisthenicsworldwide.com/equipment/door-pull-up-bar/
More Calisthenics Worldwide mentions: