Technical specifications of your Series 6 watch in detail: 📱 Screen and Design Screen: Retina OLED display with Always-On Display feature (the screen stays on to show time and notifications without you having to raise your wrist, and it's twice as bright in the sun compared to the previous version). Edges and Body: The body is made of light and resistant aluminum in dark navy blue, and the screen is protected by strengthened Ion-X glass. Resistance: Water-resistant up to 50 meters (you can swim and shower with it without worry). Sensors and Medical Features (most prominent feature of Series 6) Your watch contains very advanced health features that surpassed previous versions and the SE category: Blood Oxygen Sensor (SpO2): The Series 6 was the first Apple Watch to offer this sensor, which emits red and infrared light from the back to measure the oxygen level in your blood in just 15 seconds. Electrocardiogram (ECG): The feature to take an ECG through the graph application by simply placing your finger on the Digital Crown to detect any irregularities such as atrial fibrillation. Electrical and Optical Heart Rate Sensor: To monitor your heart rate around the clock and alert you if it rises or falls below the normal rate while you are at rest. Performance and Battery Processor: Powered by the dual-core Apple S6 processor, which is very fast in opening applications and navigating interfaces (20% faster than the previous generation). Battery: Lasts up to 18 hours of daily use. Charging: Supports fast charging, and it fully charges (from 0% to 100%) in about an hour and a half only. You can download WhatsApp and Snapchat