Type of Display: Super AMOLED Dimensions: 1.5 inches 480 x 480 pixel resolution (about 453 ppi density) Sapphire crystal for protection Constantly visible Construct the aluminum frame MIL-STD-810H, the sapphire crystal glass front, and the ECG IP68 certified water resistance of 50 meters Blood pressure tracker PLATFORM OS One UI Watch 5 Android Wear OS 4 Chipset W930 Exynos (5 nm) CPU 1.4GHz dual-core Cortex-A55 GPU Internal Mali-G68 16GB 2GB RAM AUDIO Yes, a loudspeaker WLAN COMMS Dual-band Bluetooth 5.3, A2DP, LE Positioning GPS, GloNASS, Galileo, BDS NFC Yes, and Wi-Fi 802.11 a/b/g/n ASPECTS Sensors include heart rate, barometer, compass, gyro, accelerometer, and thermometer (skin temperature). Li-Ion 425 mAh non-removable battery 10W wireless charging (Qi) Suitable for common 20mm straps