Apple Watch SE 3

Apple Watch SE 3 Features

Size and Weight

44mm Model

• Height: 44mm

• Width: 38mm

• Depth: 10.7mm

• Display: 368 x 448 pixels, 977 sq mm display area

• Weight (GPS): 32.9g

• Weight (GPS + Cellular): 33g

• Fits wrists: 140–245mm

40mm Model

• Height: 40mm

• Width: 34mm

• Depth: 10.7mm

• Display: 324 x 394 pixels, 759 sq mm display area

• Weight (GPS): 26.4g

• Weight (GPS + Cellular): 27.8g

• Fits wrists: 130–200mm

Hardware and Buttons

• Buttons and Controls:

  • Digital Crown with haptic feedback

  • Side button

  • Microphone

  • Speaker / Air Vent

• Sensors:

  • Optical heart sensor

  • Compass

  • Always-on altimeter

  • Accelerometer (up to 256 g-forces, Fall Detection & Crash Detection support)

  • Gyroscope

  • Ambient light sensor

Chip

• S8 SiP with 64-bit dual-core processor

• W3 Apple wireless chip

• 32GB capacity

Health and Wellness Features

• Heart Rate app with high/low notifications

• Irregular rhythm notifications

• Crash Detection and Fall Detection

• Medications app to track daily medications

• Mindfulness app for stress relief

• Noise app to monitor ambient sound levels

• Sleep app with sleep stage tracking

• Cycle Tracking for menstrual health

Display

• Retina LTPO OLED Display

• Ion-X front glass

• Brightness: Up to 1,000 nits

• 326 pixels per inch

Power and Battery Life

• Up to 18 hours battery life (typical use)

• Built-in rechargeable lithium-ion battery

• Magnetic charging cable support

Operating System

• watchOS 11 with the latest apps, activity tracking, and health features

• Compatibility: Requires iPhone Xs or later with iOS 18 or later

Workouts and Activity Features

• Running: Custom interval workouts, pace tracking, heart rate zones

• Cycling: Bluetooth connection to accessories, FTP and Power Zones, cadence tracking

• Swimming: Pool & open-water swim, stroke detection, SWOLF score

• Other: Yoga, Dance, HIIT, Pilates, Functional training, Hiking, and more

• Activity rings for Move, Exercise, and Stand goals

Safety Features

• Emergency SOS

• International emergency calling

• Fall Detection & Crash Detection

• Noise Monitoring for hearing protection

• Backtrack feature with GPS

Durability

• Water resistant up to 50m (swimproof)

• Swim in pools and open water

• Not for scuba diving or high-velocity water sports

Connectivity

• GPS and GNSS: L1 GPS, Galileo, QZSS, GLONASS

• Cellular (GPS + Cellular models): 4G LTE and UMTS

• Wi-Fi 4 (802.11n), Bluetooth 5.3

• Apple Pay for contactless payments

• Family Setup support for kids or older adults

Additional Features

• GymKit: Sync workouts with compatible gym equipment

• Siri integration with faster responses

• Find My app for locating devices

• Integration with iPhone for notifications, calls, and messages