The Apple Watch Series 8 (45 mm, 4th generation) is a mid‑tier smartwatch released on September 16, 2022, offering robust health, fitness, and safety monitoring in a sleek design. Here’s a breakdown of its features:

Display & Design

• 45 mm case size (≈ 1.77″ × 1.50″ × 0.42″; 10.7 mm thick; ≈ 38.8 g aluminum, ≈ 51.5 g stainless steel)

• Always-On Retina LTPO OLED display at 396 × 484 resolution (~1143 mm² screen area, ~1000 nits brightness)

Performance & Storage

• Powered by an Apple S8 SiP (64‑bit dual‑core processor) and includes the W3 wireless chip and U1 (Ultra Wideband) chip, ensuring fast responsiveness and precise spatial awareness

• Offers 32 GB internal storage (no expandable memory) to store apps, music, and photos

Health & Safety Features

• ECG app and third‑generation optical heart sensor for real‑time heart monitoring

• Blood Oxygen (SpO₂) sensor and app for measuring oxygen saturation

• Skin Temperature sensor for cycle tracking and fertility insights

• Safety features like fall detection, crash detection, and Emergency SOS/international emergency calling

Navigation & Location

• Built‑in GPS (L1), GLONASS, Galileo, QZSS, BeiDou, plus a Compass with Backtrack feature for route retracing

Durability & Build

• Water-resistant to 50 meters and dust-resistant (IP6X certified)

• Available in aluminum colors (Midnight, Starlight, Silver, RED) or stainless steel finishes (Silver, Graphite, Gold)

Battery & Charging

• Offers up to 18 hours of typical use on a full charge

• Includes magnetic wireless charging via a USB‑C cable for quick power‑ups

Software & Connectivity

• Runs watchOS 9, compatible with iPhone models running iOS 16 or later

• Bluetooth 5.x, Wi‑Fi, and optional LTE/cellular support depending on configuration

• Apple Pay, App Store, Fitness+ integration, and full support for Apple ecosystem features like GymKit and Siri voice control