General
Compatible earbuds include:
AirPods Pro, AirPods with MagSafe,
Samsung Galaxy Buds, Buds 2, Buds+, Buds Live
Google Pixel Buds, Pixel Buds Pro.
iPhones 8-11 can also be charged via the magnetic charger with the addition of a magnetic ring (sold separately) to the back of the phone, which allows it to adhere to the charger.
Alternatively, iPhones 8-11 can be charged by placing them on the AirPods/Qi charging cradle. It may be necessary to move the iPhone around a bit to find the optimal charging position on the cradle.
Compatibility
Apple Watch (1st Generation)
Apple Watch Series 1-8
Apple Watch SE
Apple Watch SE (2nd Generation)
Apple Watch Ultra
This does not support Apple Watch fast charging.