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China R7 Smart Jewelry Ring with Magnetic Charging Cable, 5 Days Standby, IP68 Waterproof Fitness Tracker, Find Details and Price about Fashionable Smart Ring Heart Rate Measurement Ring from China R7 Smart Jewelry Ring with Magnetic Charging Cable, 5 Days Standby, IP68 Waterproof Fitness Tracker - Shenzhen Shangdong Jiyuan Technology Co., Ltd.