Samsung Galaxy Watch4 Classic Key Features Refined design with rotating bezel Track your fitness in all sports Measure ECG and blood pressure in real-time Compete with friends & family Exynos W920 Dual-Core 1.18GHz (5nm Processor) Bluetooth 5.0 and 4G connectivity Super AMOLED touch display Wear OS Powered by Samsung 5ATM + IP68 / MIL-STD-810G Overview Get to know your body composition with the Samsung Galaxy Watch4. Track your fitness progress with a smartwatch capable of checking fat percentage, skeletal muscle, body water and more. A timeless design features a rotating bezel and high-end stainless-steel materials bringing sophistication to your wrist. It is ideal for functionality during your workouts and daily tasks. The Samsung BioActive Sensor measures ECG and blood pressure in real-time, with the possibility to check for abnormal heart rate rhythm through ECG, with the data being sent straight to your phone. Sleep tracking detects and analyses your sleep stages while you rest with the options to check blood oxygen and snoring patterns. Compete with friends and family on the number of steps you take and join the fun and challenging competitions. Choose from a wide selection of apps on the first smartwatch powered by WearOS, adding everything from music streaming to health and fitness. Specification Dimension & Weight Stainless steel case 46mm: 45.5 x 45.5 x 11.0mm, 52g 42mm: 41.5 x 41.5 x 11.2mm, 46.5g Display  46mm: 1.4\" (34.6mm) 450x450 Super AMOLED, Full Color Always On Display, Corning® Gorilla® Glass with DX 42mm: 1.2\" (30.4mm) 396x396 Super AMOLED, Full Color Always On Display, Corning® Gorilla® Glass with DX Processor Exynos W920 Dual Core 1.18GHz (5nm Processor)  Memory 1.5GB RAM + 16GB internal storage Battery 44mm/46mm: 361mAh, 40mm/42mm: 247mAh (typical) WPC-based wireless charging OS Wear OS Powered by Samsung UI One UI Watch3  Sensors Samsung BioActive Sensor (Optical Heart Rate + Electrical Heart + Bioelectrical Impedance Analysis), Accelerometer, Barometer, Gyro Sensor, Geomagnetic Sensor, Light Sensor Connectivity LTE, Bluetooth 5.0, Wi-Fi 802.11 a/b/g/n 2.4+5GHz, NFC, GPS/Glonass/Beidou/Galileo Durability 5ATM + IP68 / MIL-STD-810G Compatibility Android 6.0 or higher and with more than 1.5GB of RAM