Apple Watch Series 9 45mm

• 45mm or 41mm case sizes
• Aluminum or stainless steel
• Speaker
• Microphone

Control:

• Digital Crown with haptic feedback
• Side button
• Double tap gesture
• On-Device Siri

Display:

• Always-On Retina LTPO OLED display
• Edge-to-edge display
• Ion-X front glass (Aluminium cases)
• Sapphire front crystal (Stainless steel cases)
• Up to 2,000 nits maximum brightness
• 1 nit minimum brightness

Chip:

• S9 SiP with 64-bit dual-core processor
• 4-core Apple Neural Engine
• 64GB capacity

Sensors:

• Blood oxygen sensor and app ^Footnote 3
• Electrical heart sensor and ECG app ^Footnote 4
• Third-generation optical heart sensor
• High and low heart rate notifications ^Footnote 4
• Irregular rhythm notifications ^Footnote 5
• Sleep stages
• Temperature sensing ^Footnote 6
• Compass with Waypoints and Backtrack
• Always-on altimeter
• High-g accelerometer
• Ambient light sensor