For sale is a spare Oura Ring Charger (Generation 2, though does work with Generation 3 rings as well - I have owned both and used this to charge both). - Included is the Gen2 Charger & USB Cable - This is for SIZE 10 rings only (Size 11 will charge, though you need to place it carefully on the charger) Compare new at $79 (https://ouraring.com/product/accessories/charger-oura-3/10)