This smart ring charger is only compatible with Ou-ra Ring Gen4.
Note: not compatible with ou-ra ring gen 3 Horizon/Heritage and other smart rings. Carefully measure your Ou-ra Ring 4 and choose the right charger size. About 80 minutes of fully charging with the included Type-C cable, depending on the initial battery level of the ring, and may vary for different ring sizes.
Note: charging adapters are not included. The charging case's indicator light pulses white during charging and turns a solid green once fully charged. This ring charger only measures 1.94 * 1.94 * 0.69 inches, making it easy to carry and charge everywhere