This is a combination iPhone/ Apple Watch/ AirPods charger.
You'll also need a micro-USB cable with a slim connector. I bought these, also from Amazon: https://www.amazon.com/gp/product/B01M0LK2SK/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1
It uses a standard Apple Lightning cable for the AirPods charging part and a standard Apple Watch charging puck for the Apple Watch.
I highly recommend printing with the highest resolution available as I designed it with tight tolerances for a good finish.
The screw holes are small to allow for drilling/adapting to whatever screws you want to use. I am using flat-head M1 torx screws.
The photos here are of the one I made and I spent a lot of time on post-processing (sand-blasting with glass beads, sanding and painting).
I still haven't printed the cover shown in the renders, but the idea is that the cables can be tucked inside the cover and whole thing becomes travel-friendly.
I braided the 3 cables to make it tidier.
I will soon post a video with assembly instructions.
Not necessary for functionality, but the one in the picture was sand-blasted, corrected with XTC-3D epoxy, sanded and painted.