Ultra-slim and Light Design Always-on AMOLED Display Blood-oxygen Saturation Measurement 70+ Sports Modes Real-time Tracking and Analysis Female Cycle Tracking Long Battery Life Heart Rate Monitoring Vibrant AMOLED Display Enhanced Color and Clarity All-round Health Management Sleep Quality Monitoring PAI™ Health Assessment System Stress Level Monitoring 14-day Battery Life Screen Size: 1.55 inchScreen Type: AMOLEDResolution: 354 x 306