1、Smart Ring Fitness Tracker: The fitness tracker smart ring could record your distance, calories burned, and workout time accurately with this fitness ring to track your daily progress. 2、Premium Materials: Made with aerospace grade aluminum with modern frosted surface processing technology, this smart ring is not only stylish but also long lasting and wear resistant. 3、Sleep Monitoring: Evaluate sleep quality based on the proportion of REM, light, and deep sleep during the entire sleep cycle, providing appropriate advice for better sleep quality. 4、IP68 Waterproof: With a fully sealed structure and IP68 waterproof technology, this smart ring is suitable for daily waterproof handling, including swimming, handwashing, bathing, and showering. 5、Long Battery Life: Equipped with an ultra low power control chip and a 20mAh polymer lithium battery, this ring has deep power management and low power mode selection, greatly improving its performance. Item Type: Fitness Tracker Smart Ring Material: Metal Battery: 20mAh Lithium Battery (built in) Battery Life: 5-7 days, depending on usage frequency Bluetooth Range: 3-5 meters Waterproof Level: IP68 waterproof Compatible System: for iOS, for Android Charging Method: Magnetic Absorption Charging Wearing Instructions: Measure the circumference of the finger for wearing 1 x Fitness Ring 1 x USB Cable 1 x User Manual