【Ultra-Thin Fashion Design】At just 5.8mm thick and weighing only 17.15g, this sleek health bracelet features an elegant square-cut crystal setting for sophisticated style. 【Comprehensive Health Monitoring】24-hour continuous tracking of heart rate, blood oxygen, HRV, stress levels, and sleep quality for complete wellness management. 【Women's Health Tracking】Specialized menstrual cycle monitoring tracks ovulation, menstruation, safe periods, and fertile windows with personalized health insights. 【15-Day Long Battery Life】Extended standby time up to 15 days with magnetic charging, ensuring reliable daily use without frequent charging interruptions. 【Multi-Sport Modes & Data Sync】Supports various exercise modes including running and cycling with real-time data synchronization to the LUCK RING app. 【3ATM Water Resistance】Suitable for daily water activities including handwashing, face washing, rain exposure, and car washing scenarios. Specifications: Hardware Main chip CPU AB2026B3 Compatible systems Android 6.0 and above; IOS 10.0 and above Material Zinc alloy+plastic Bluetooth-compatible version Bluetooth-compatible 5.3 Battery capacity Polymer battery 18mAh Working hours 3-5 days Charging time 2H G Sensor SC7A20H Heart rate sensor HX3918 Charging line Magnetic attraction charging belt protection IC Waterproof grade 3ATM Charging parameter Charge 1A or less Function Major function Heart rate detection Blood oxygen detection stress testing Sleep monitoring Step counting emale physiological cycle Female variability Multi-motion mode Shake and take pictures Synchronize data to APP Environmental requirement Working temperature: 0~45 degrees Storage temperature; -10-55 degrees Electrostatic protection: contact 6K and air 10K Charging temperature protection: 45 degrees Surge protection: 12V Package included 1 x Smart Bracelet 1 x Charging Cable 1 x English User Manual Specifications Brand N/A Certificate CE-RED,CE-RoHS,FCC-ID Color Gold Packaging Type Colored Box Plug Type (For Supply) N/A User Manual (Language) English Gross Weight 0.095kg Volume Weight 0.062kg Package Length 27.500cm Package Width 5.000cm Package Height 2.000cm