Apple Watch Series 9 Gps 45Mm Starlight Al. Starlight Sb S/M

Sensors:
• Electrical heart sensor
• Third‑generation optical heart sensor
• Temperature sensing1
• Compass
• Always‑on altimeter
• High‑g accelerometer
• High dynamic range gyroscope
• Ambient light sensor

Health and Wellness:
• Blood Oxygen app2
• ECG app3
• Cycle Tracking app with retrospective ovulation estimates4
• Heart Rate app
• High and low heart rate notifications
• Irregular rhythm notifications5
• 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 (aluminium cases)
• Sapphire front crystal (stainless steel cases)
• Up to 2,000 nits maximum brightness
• 1 nit minimum brightness
• 326 pixels per inc

Power and Battery Life:
• All‑day battery life, up to 18 hours of normal use6
• Up to 36 hours in Low Power Mode6
• Built‑in rechargeable lithium‑ion battery
• Fast‑charge capable7
• Up to 80% charge in about 45 minutes