Retail price: ¥16,800 Size: 16.5 I turned it on and wore it once after purchase, but I haven't had a chance to use it since then, so I'm putting it up for sale. Please check the images and purchase if you are satisfied. Brand: Ee - Model Name: Smart Touch Ring - Accessories: Charging case, instruction manual - Color: Silver [Set Contents] - Ring body - Charging box - BOX dedicated charging cable (type-c, USB) Smart ring, smart ring, fitness ring, health management goods, activity tracker, sleep record, exercise record, blood oxygen saturation, IP68 waterproof, unisex, finger health management ring, size 7, size 9, size 10, size 11, ultra-lightweight, GPS exercise record, sleep measurement, sleep monitor, sleep accuracy, blood oxygen saturation, heart rate, heart rate measurement, running, smart watch, heart rate, iPhone 14, iPhone 14 Pro, iPhone 14 Pro Max, iPhone 15, iPhone 15 plus, iPhone 15 pro, iPhone 15 Pro Max compatible, sports ring, running ring, distance traveled, sleep meter, lovers, friends, kids, children, father, mother, present, gift, year-end gift, Respect for the Aged Day, home use, White Day, official, practical, Coming of Age Day, Coming of Age Ceremony, Valentine's Day, White Day, graduation ceremony, entrance ceremony, Mother's Day, Father's Day, Respect for the Aged Day, Christmas, Christmas present, Xmas, birthday, celebration of longevity, celebration, gift, present, Mother's Day, still in time for Mother's Day, Mother's Day gift, recommended, commemorative goods, practical, Father's Day gift, Black Friday, calorie consumption, unisex, women's, men's, for beginners, stylish, health management companion, recommended, diet, health ring