About This

• [Size Before You Buy] AutrefoisElf smart ring for women and men utilizes a unique sizing system. Available in Size 6-14, we strongly suggest referring to our size chart and measuring your finger circumference carefully. Using the sizing kit before purchase ensures the comfortable wearing experience and optimal sensor performance.
• [24/7 Health Monitoring & No Subscription] Gain deep insights into your body with 24/7 heart rate, HRV, sleep, stress levels and oxygen saturation. This fitness tracker helps you understand your physical trends without any subscription fees.
• [30-Day Power & Dual Charging] Features an ultra-thin 5mm design with a revolutionary dual-charging system. Use the dedicated data cable for a direct charge, or use the portable charging case for up to 30 days of total battery life. A quick 1-hour charge supports 3-5 days of regular use, ensuring you stay powered anywhere.
• [140+ Sport Modes & 50M Water Resistant] Whether you are swimming, showering, or hitting the gym, the 50M waterproof rating has you covered. The fitness ring tracks 140+ activities with precision, capturing every step and calorie burned to help you reach your fitness goals.
• [Sleep Tracking & Smart Versatility] With a 5mm thin and lightweight build, this smart ring tracks deep, light, REM sleep stages and calculates sleep quality scores. Compatible with Android and iOS, it provides female cycle tracking and a shake-to-capture remote camera function.

Overview

• Operating System : Android 8.0+, Apple iOS 10.0+, HarmonyOS
• Special Feature : Activity Tracker, Cycle Tracking, Daily Workout Memory, Multisport Tracker
• Battery Capacity : 20 milliamp_hours
• Connectivity Technology : Bluetooth
• Battery Cell Composition : Lithium Ion
• GPS : No GPS
• Shape : Round
• Brand : AutrefoisElf
• Model Name : Smart Ring Gen 4
• Style : Modern