The Amazfit GTR 2 smartwatch features a 1.39-inch high-definition AMOLED screen with 326ppi pixel density, covered in 3D glass, which naturally transitions to the stainless steel watch body, resulting in a better visual aesthetic and a wider content display area.The Amazfit GTR 2 smartwatch can provide 24-hour heart rate monitoring, blood-oxygen saturation measurement, sleep quality monitoring and stress level monitoring. Also included is the PAI health assessment system, which uses algorithms to convert all of complex health and activity data into one single score, to help you understand your physical state at a glance.