Apple Watch SE 3

Product Description

Apple Watch SE (3rd Generation) – Technical Specifications

Material & Finish

• Aluminum case available in Starlight and Midnight.

Size, Weight & Display

44 mm model:

• Height: 44 mm
• Width: 38 mm
• Depth: 10.7 mm
• Display resolution: 368 × 448 pixels (977 mm²)
• Weight: ~32.9 g (GPS) / ~33.0 g (GPS + Cellular)
• Wrist fit: 140–245 mm

40 mm model:

• Height: 40 mm
• Width: 34 mm
• Depth: 10.7 mm
• Display resolution: 324 × 394 pixels (759 mm²)
• Weight: ~26.3 g (GPS) / ~26.4 g (GPS + Cellular)
• Wrist fit: 130–200 mm

Hardware & Controls

• Digital Crown with haptic feedback
• Side button
• Microphone and speaker (air vent)
• Optical heart rate sensor
• Controls include double-tap and wrist-flick gestures, plus Siri with on-device processing.

Chip & Performance

• S10 chip with 64-bit dual-core processor
• 4-core Neural Engine
• 64 GB internal storage capacity

Sensors

• 2nd-generation optical heart sensor
• Temperature sensor
• Compass
• Always-on altimeter
• High-g accelerometer
• High dynamic range gyroscope
• Ambient light sensor

Health & Wellness Features

• Cycle Tracking app with retrospective ovulation estimates
• Heart Rate and Mindfulness apps
• Notifications for high/low heart rate and irregular rhythms
• Medications app
• Noise monitoring
• Sleep app with sleep stages, sleep score, and sleep apnea notifications

Display Tech

• Always-On Retina OLED with LTPO
• Tough Ion-X front glass (4× more crack resistance)
• Peak brightness: up to 1000 nits; minimum brightness: 2 nits
• Resolution: ~326 ppi

Audio

• Built-in speaker and microphone
• Supports media playback

Battery & Charging

• All-day battery life: up to 18 hours normal use
• Low Power Mode: up to 32 hours
• Fast-charge capable: reaches ~80% in ~45 minutes
• 15 minutes of charging gives ~8 hours of normal use or sleep tracking

Operating System

• Runs watchOS, featuring apps designed for health, safety, connectivity, and fitness.

Fitness & Activity Tracking

• Supports custom workouts, Training Load, Heart Rate Zones, Race Route, Pacer, stride metrics, and automatic track detection
• Outdoor features include compass with waypoints, incline/elevation, offline/topographic maps, and curated hikes
• Cycling metrics: speed, elevation, functional power zones, cadence, and Live Activity on iPhone
• Swimming support for pools and open water: auto sets, stroke/kickboard detection, SWOLF, pace, and distance
• Additional workout types like skiing, rowing, HIIT, yoga, Pilates, wheelchair tracking, and more

Safety Features

• Emergency SOS
• International emergency calling
• Crash Detection
• Fall Detection
• Noise monitoring
• Backtrack feature (to retrace steps)

Durability & Water Resistance

• Swim-proof with 50 m water resistance (ISO standard)
• Suitable for shallow-water activities; not for scuba diving or high-velocity water exposure

Connectivity

• GPS (L1) plus support for GNSS, Galileo, QZSS
• 5G and LTE cellular
• Wi-Fi 4 (802.11n) – 2.4 GHz only
• Bluetooth 5.3
• Apple Pay support, GymKit integration
• Apple Watch For Your Kids support
• International roaming supported

Accessibility Features

Includes support for:

• VoiceOver, Zoom, On/Off labels, Contrast and Motion adjustments, Color Filters, Text Size, Bold Text, AssistiveTouch, Touch accommodations, Auto-answer, Type to Siri, Live Speech, Mono audio, Taptic Time, Personal Voice, Live Listen, and more for vision, mobility, hearing, and cognitive assistance

Environmental Design

• Built with 40% recycled content, including recycling across aluminum, battery materials, magnets, circuit boards, and glass
• Manufactured using 100% renewable electricity
• Compact, fiber-based packaging (no plastics), enabling 40% more units per shipment
• Final assembly sites operate with zero waste to landfill
• Adheres to strict material sourcing and regulated substances standards

Compatibility & In the Box

Compatibility: Requires iPhone 11 or later, running iOS 26 or newer.
Included: Apple Watch SE 3, band, the Apple Watch Magnetic Fast Charger to USB-C cable (1 m).

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Summary Table

Category	Highlights
Sizes & Weight	40 mm & 44 mm; lightweight aluminum design
Display	OLED LTPO Always-On; tough Ion-X front
Chip & Storage	S10 chip, 4-core Neural Engine, 64 GB capacity
Sensors	Heart rate, temp, compass, altimeter, motion sensors
Health Features	HR notifications, cycle tracking, sleep, meds, noise alerts
Battery	Up to 18 h normal use; fast charging supported
Safety	SOS, Crash/Fall Detection, Backtrack
Connectivity	GPS, 5G/LTE, Wi-Fi, Bluetooth 5.3, Apple Pay
Fitness Tracking	Wide variety of workouts and mapping features
Accessibility	Full suite of assistive tools
Eco Design	40% recycled materials, renewable power, zero-waste assembly