Always-On Retina OLED Display Battery • Up to 24 hours of normal use. • Up to 38 hours in power-saving mode. • Fast charging.  Health Sensors • Heart rate measurement. • ECG. • Blood oxygen sensor. • Temperature sensor. • Sleep tracking with Sleep Score. • Hypertension Notifications.  Connectivity • Built-in GPS. • Wi-Fi and Bluetooth. • GPS-only and GPS + Cellular versions available. • 5G support in cellular versions.  Water Resistance • Water-resistant for swimming. • Water depth and temperature sensor.  Materials and Colors Size: 42 The watch is a week old and was purchased from STC.