The Apple Watch Series 9 (GPS, 41mm) features a Starlight aluminum case paired with a Starlight Sport Band in Small/Medium sizing. Powered by Apple's S9 SiP chip with a 64-bit dual-core processor and 4-core Neural Engine, it delivers fast on-device Siri processing and a new double tap gesture for hands-free control. The always-on Retina LTPO OLED display reaches up to 2000 nits of brightness at 326 pixels per inch, protected by Ion-X front glass.

Health and fitness tracking includes an ECG app, third-generation optical heart sensor, electrical heart sensor, temperature sensing, sleep tracking with sleep stages, cycle tracking with retrospective ovulation estimates, and irregular rhythm notifications. The altimeter, compass, high-g accelerometer, and gyroscope support detailed workout metrics for running, cycling, hiking, swimming, and over 20 additional workout types. Crash Detection and Fall Detection provide safety features alongside Emergency SOS with international emergency calling.

The watch measures 41mm x 35mm x 10.7mm and weighs 31.9 grams. It offers all-day battery life up to 18 hours (up to 36 hours in Low Power Mode) and fast charging to 80% in approximately 45 minutes. Connectivity includes L1 GPS, GNSS, Galileo, BeiDou, Wi-Fi 4, Bluetooth 5.3, second-generation Ultra Wideband, and Apple Pay. It is water resistant to 50 meters and dust resistant to IP6X. 64GB storage capacity. Runs watchOS with access to thousands of apps.