Advanced health and safety features like fall detection, cellular and GPS tracking, and an ecg app are available with the Apple Watch Series 7 45m. In addition, it has a bright display, longer battery life, and 50-meter water resistance. Because of all of this, it's the ideal option for swimming, active fitness tracking, and daily use. 32GB of ROM 1GB of RAM Display size: 1.9 in. 45 M in size Li-Ion 309 mAh battery