40mm Case Size/ GPS/ watchOS 8/ Retina LTPO OLED Display (1000 Nits Brightness)/ Bluetooth 5.0/ Ion-X Glass Display/ 50m Water Resistant/ Always-On Altimeter/ Digital Crown With Haptic Feedback/ Second-Generation Optical Heart Sensor/ Fall Detection/ S5 SiP with 64-bit Dual-core Processor/ Gold Aluminum Case With Starlight Sport Band Finish