Refurbished Apple Watch SE 3 (40mm & 44mm) - Product Features & Specifications
Key Features & Highlights
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Always-On Retina Display with up to 1,000 nits brightness for excellent visibility
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S10 chip with 64-bit dual-core processor and 4-core Neural Engine
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Advanced health insights including heart rate monitoring, sleep stages, sleep score and sleep apnoea notifications
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Wrist temperature sensing for deeper wellness insights and Cycle Tracking with retrospective ovulation estimates
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Comprehensive workout tracking with GPS, Activity rings and customisable workouts
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Safety features including Crash Detection, Fall Detection and Emergency SOS
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Up to 18 hours battery life, or up to 32 hours using Low Power Mode
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Fast charging support for quick power top-ups
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Water resistant to 50 metres, suitable for swimming
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watchOS with on-device Siri, intuitive gestures and Smart Stack
Case, Finish & Size
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Case Material: Aluminium
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Colour Options: Starlight, Midnight
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40mm Case: 40mm height × 34mm width × 10.7mm depth
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44mm Case: 44mm height × 38mm width × 10.7mm depth
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Front Glass: Tough Ion-X glass with enhanced crack resistance
Display
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Display Type: Always-On Retina OLED LTPO display
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40mm Resolution: 324 × 394 pixels, 759 sq mm display area
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44mm Resolution: 368 × 448 pixels, 977 sq mm display area
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Brightness: Up to 1,000 nits maximum, 2 nits minimum
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Pixel Density: 326 pixels per inch
Performance & Storage
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Chip: S10 SiP with 64-bit dual-core processor
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Neural Engine: 4-core
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Storage Capacity: 64GB
Sensors
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Heart Sensor: Second-generation optical heart sensor
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Temperature Sensor: Wrist temperature sensing
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Motion Sensors: High-g accelerometer, high-dynamic-range gyroscope
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Other Sensors: Compass, always-on altimeter, ambient light sensor
Health & Wellness Features
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Heart Rate Monitoring: High and low heart rate notifications
- Irregular Rhythm Notifications
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Sleep Tracking: Sleep stages, sleep score and sleep apnoea notifications
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Cycle Tracking: Retrospective ovulation estimates
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Wellness Apps: Medications, Mindfulness, Noise and Vitals apps
Workouts & Activity
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Activity Tracking: Move, Exercise and Stand rings
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Workouts: Running, cycling, swimming, HIIT, yoga, Pilates, strength training and more
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GPS Tracking: Distance, pace, route and elevation
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Advanced Metrics: Heart rate zones, training load and custom workout views
Safety Features
- Emergency SOS
- Crash Detection
- Fall Detection
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Check In and location sharing
- Medical ID
Connectivity
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GPS Models: GPS, Wi-Fi and Bluetooth
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GPS + Cellular Models: GPS, Wi-Fi, Bluetooth, 4G LTE and 5G RedCap support
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Wireless: Wi-Fi 4 (2.4GHz), Bluetooth 5.3
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Location: L1 GPS with support for multiple satellite systems
Battery & Charging
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Battery Life: Up to 18 hours of normal use
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Low Power Mode: Up to 32 hours
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Charging: Fast-charge capable
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Typical Charge Time: Up to 80% in around 45 minutes
Durability
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Water Resistance: Rated to 50 metres (swim-proof)
Operating System & Compatibility
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Operating System: watchOS
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Compatibility: iPhone 11 or later with iOS 26 or later
Model Numbers:
A3326 - GPS + Cellular 40mm
A3328 - GPS + Cellular 44mm
A3324 - GPS only 40mm
A3325 - GPS only 44mm
Product Disclaimers & Footnotes
Temperature sensing is not intended for medical use. The Vitals app and Cycle Tracking app are for wellness purposes only and are not intended for medical diagnosis or birth control. Sleep apnoea notifications are intended to detect signs of moderate to severe sleep apnoea for adults aged 18 years or older without a prior diagnosis and are not a substitute for medical advice.
Battery life varies by use, configuration, network conditions and other factors. Fast-charge testing was conducted by Apple using pre-production devices and Apple-approved accessories. Actual charging times may vary.
Emergency SOS requires a mobile network connection or Wi-Fi calling. Cellular features require an active compatible service plan. Availability and performance may vary by carrier and region. International roaming is not supported.
Apple Watch SE 3 is water resistant to 50 metres under ISO standard 22810:2010 and is suitable for shallow-water activities such as swimming. Water resistance is not a permanent condition and may diminish over time.
Some features, applications and services may not be available in all regions or languages and are subject to change. Apple Watch SE 3 requires a compatible iPhone and Apple ID.
