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Apple Watch Series 9 Silver Stainless Steel Case 45mm - $300
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Height: 45mm
Width: 38mm
Depth: 10.7mm
Weight (stainless steel): 51.5 grams
Fits 140–245mm wrists
Hardware and Buttons
-Digital Crown
-Microphone
-Side button
-Electrical heart sensor
-Speaker/air vent
-Optical heart sensor
Controls
-Digital Crown with haptic feedback
-Side button
-Double tap gesture
-Siri with on‑device processing
Chip
-S9 SiP with 64‑bit dual‑core processor
-4‑core Neural Engine
-64GB capacity
Sensors
-Electrical heart sensor
-Third‑generation optical heart sensor
-Temperature sensing
-Compass
-Always‑on altimeter
-High‑g accelerometer
-High dynamic range gyroscope
-Ambient light sensor
Health and Wellness
-ECG app
-Cycle Tracking app with retrospective ovulation estimates
-Heart Rate app
-High and low heart rate notifications
-Irregular rhythm notifications
-Medications app
-Mindfulness app
-Noise app
-Sleep app including sleep stages
Display
-Always‑On Retina LTPO OLED display
-Edge‑to‑edge display
-Ion‑X front glass (aluminum cases)
-Sapphire front crystal (stainless steel cases)
-Up to 2000 nits maximum brightness
-1 nit minimum brightness
-326 pixels per inch
Power and Battery Life
-All‑day battery life, up to 18 hours of normal use
-Up to 36 hours in Low Power Mode
-Built‑in rechargeable lithium‑ion battery
-Fast‑charge capable
-Up to 80% charge in about 45 minutes
Operating System
-watchOS
-watchOS is the world’s most advanced wearable operating system, with apps and features designed to keep you active, healthy, safe, and connected.