Compatible With Apple Watch® And Large Samsung Smart Watches | Removable Insert Ring | Adheres Magnetically To The Back Of Your Smart Watch | Dual USB-A Type-C Outputs | Features A USB-A Or Type-C Input (Cord Built-In) | Cord Doubles As Carrying Loop | Requires Your Watch Charger To Charge Your Device | Apple is a trademark of Apple Inc., registered in the U.S. and other countries | Samsung is a trademark of Samsung Group, registered in the U.S. and other countries