Apple Watch Series 9 GPS 45mm Starlight Aluminium Case with Starlight Sport Loop is a 2023 smartwatch with a 45 mm aluminium case. It features an Always-On Retina LTPO OLED display with 396 x 484 pixel resolution, up to 2000 nits brightness, and Ion-X front glass protection. Inside, it runs on the Apple S9 SiP with a 64-bit dual-core processor and 4-core Neural Engine, plus 64 GB of internal storage.

The watch includes electrical and third-generation optical heart sensors, temperature sensing, compass, always-on altimeter, accelerometer, and gyroscope. It supports ECG App, Cycle Tracking, Sleep monitoring, Fall Detection, Crash Detection, Emergency SOS, Double tap, and Precision Finding. The device is water resistant to 50 m and rated IP6X for dust resistance.

It connects via GPS and Bluetooth, supports NFC and Apple Pay, and offers up to 18 hours of battery life, or up to 36 hours in Low Power Mode. Fast charging brings it to 80% in about 45 minutes. The Starlight case and Starlight Sport Loop make it a versatile choice for both daily wear and fitness use.