The item Type of Display: Retina LTPO OLED, peak brightness of 2000 nits Dimensions: 1.9 inches 484 x 396 pixels with a density of about 326 ppi Stainless steel frame, glass front, and ceramic or sapphire crystal back 50 meters of IP6X water resistance HW certified sapphire crystal glass protection, ECG certified Constantly visible APPLE S9 chipset, PLATFORM OS watchOS 10, upgradeable to watchOS 10.2 CPU with two cores GPU PowerVR 64 GB internal storage Sound The speaker Indeed. COMMS WLAN, dual-band Wi-Fi 802.11 b/g/n A2DP, LE GPS, GLONASS, GALILEO, QZSS, BDS NFC, Bluetooth 5.3 Indeed. Sensors include a compass, a gyroscope, a heart rate monitor, a barometer, an always-on altimeter, SpO2, VO2max, and body temperature. temperature sensor with an accuracy of 0.01˚ support for Ultra Wideband 2 (UWB). Li-Ion 308 mAh non-removable battery type 45-minute wireless charging from 0-80% (advertised)