40MM 40mm * Display: Retina OLED touchscreen, with Force Touch * Processor: Dual-core Apple S4 * Storage: 16GB * Water Resistance: Up to 50 meters * Sensors: Heart rate sensor, accelerometer and gyroscope, and ambient light sensor * ECG: Available in supported versions and regions * Battery: Up to approximately 18 hours depending on usage * Connectivity: Bluetooth 5.0 and Wi-Fi, with GPS and Cellular versions available * Operating System: Launched with watchOS 5, but support for recent versions is very limited compared to new watches. * Charging: Magnetic charging Case Size: 40mm Series: Apple Watch Series 4 Color: Gold Connectivity: GPS + Cellular Condition: New