Specifications Hign-concerned Chemical:None Waterproof Grade:3ATM Model Number:For New smart ring Display screen:No NFC Support:No Function:Message Reminder Activity Tracked:Activity Tracker,Steps Tracker,Distance Tracker,Calorie Tracker Metrics measured:Heart Rate Monitor,Blood Pressure Monitor,Sleep Monitor,Blood Oxygen Monitor,Stress Monitor Item Weight:10 Case Material:Alloy Certification:ce,DOT,FCC,EAC Brand Name:YeasMaie Battery Capacity(mAh):80 Smart Ring For Ring with Display Screen Gesture Swipe Tiktok Video Health Monitor IP68 &5ATM Waterproof Smartring Smart Health Ring Your 24/7 Wellness Companion (5-Day Battery | 50m Waterproof | No Subscription Fees) Key Features All-Day Health Tracking Heart rate, blood oxygen & sleep monitoring IP68 Life Waterproof Function 15+ Sport Modes Auto-detects running, swimming, yoga & more 5-Day Battery Only 1-hour charge needed Smart Touch Control Scroll TikTok, take photos & more with gestures Free App Syncs with Apple Health/WeChat (no monthly fees) Technical Specifications Feature Specification Battery Life:4-5 days use / 16-20 days standby Weight:3.2g (ultra-light) Thickness 2.6mm (slim profile) Sensors Tianyi 3918 HR sensor + SC7A20H motion Color Options Black ; Gold ; Silver What's Included 1 Smart Ring 1 Magnetic Charger 1 User Manual (Perfect for: Fitness lovers, travelers & anyone wanting health insights without a smartwatch!) Find Your Size SizeDiameterFits #818.2mm #919.0mm #1019.9mm #1120.7mm #1221.5mm #1322.3mm Tip: Measure your finger with string before ordering!