Ring 4 Charger - Size 13 - Charging Dock and USB-C Cable - Charges Ring 4 up to 8 Days

This USB-C cable charger is the exclusive method for charging your Oura Ring 4. It is size-specific; ensure you select the size that corresponds to your Oura Ring 4. Your ring size is indicated on the inside of your Oura Ring 4. A full charge typically takes between 20 and 80 minutes, varying with the current battery level. To check the battery level, tap the circular icon located in the upper right-hand corner of the home tab in the Oura app. The USB-C to USB-C Oura Ring 4 cable is designed to be powered by an external 5Vdc supply that meets the IEC 62368-1 standard.