Please be sure to read the description. Due to the risk of product substitution, we do not accept returns or cancellations. Thank you for your understanding. This is the latest model of the Oura Ring, the "Oura Ring 4." This 4th generation model has further improved accuracy in sleep tracking and condition management. [Product Information] Model: Oura Ring Gen4 (Oura Ring 4th Generation) Color: Brushed Silver Size: US 7 (Size 7) Retail Price: 59,800 yen (tax included) [Condition] Used for approximately one year. There are minor scratches on the surface of the ring due to daily use. Please refer to the images. This is a used item, so please refrain from purchasing if you are concerned about minor scratches. All accessories (charger, USB-C cable, box) are included. Operation has been confirmed, and pairing has been removed. Regarding the battery: From a 100% charge, With full use (nighttime blood oxygen wellness, workout heart rate measurement, etc.), the battery decreased to about 30% in approximately 4-5 days. This may vary depending on usage, so please consider this as a reference value. As a bonus, a silicone ring cover will be included. [Please Note] To use all the features of the Oura Ring, you need to subscribe to a membership (subscription) for 999 yen (tax included) per month. #OuraRing #オーラリング #OuraRing4 #オーラリング4 #第4世代 #スマートリング #ウェアラブル #睡眠トラッキング