Compatibility: This Galaxy watch charger is specially designed for Samsung Galaxy Watch 4 of 1.575 inches, 1.654 inches, 1.732 inches, 1.614 inches Galaxy Watch 3, 1.772 inches (not for Gear S3), Active 2 of 1.575 inches, Active of 1.732 inches, Includes SM-R860/SM-R850/SM-R850/SM-R/SM-R/SM-R.