Apple Watch Series 2 | ا Technical Specifications Case Sizes: 38mm (272x340 pixels) and 42mm (312x390 pixels). Processor: Dual-core Apple S2 chip. Storage and Memory: 8GB internal storage with 512MB RAM. Display: Second-generation Retina OLED display with 1000 nits brightness, supports Force Touch technology. Water Resistance: Up to 50 meters (suitable for swimming and surfing). Sensors: Built-in GPS, GLONASS, accelerometer, gyroscope, heart rate sensor, and ambient light sensor. Battery: Lasts up to 18 hours. Materials: Available in aluminum, stainless steel, and ceramic cases. Connectivity: Wi-Fi (802.11 b/g/n 2.4GHz), Bluetooth 4.0, and NFC (for Apple Pay support).