Apple watch series 4 has 1.57 inch (3.99 cm) ltpo amoled display display for apps and other functions of the smartwatch. On the wear-ability side, this smartwatch weighs 40 grams. It has other features like waterproof, fitness tracking, rectangular, curved dial design, 1.57 inch (3.99 cm) ltpo amoled display...The major highlight addition to the apple watch series 4 are health-related. The biggest health function of the watch 4 is unarguably the new ecg function..
The watch 4 is powered by and s4 processor chipset and laced with the new watch os 5 preinstalled. Battery size on the watch 4 is the same as the watch 3 and apple claims that it will also be able to supply 18 hours of usage...The watch sensors include accelerometer, gyro, heart rate (2nd gen), barometer, etc