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Top specifications
eSIM compatibility
No
Heart rate sensor
Yes
Usage time
Up to 18 hours
Device warranty
24 months
Design
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Interchangeable strap
Yes
Battery
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Usage time
Up to 18 hours
Removable battery
No
Fast charge
Yes
Body
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Dimensions (mm)
40mm: 40x34x10.7
44mm: 44x38x10.7
Weight (g)
40mm (GPS): 26.4
40mm (GPS + Cellular): 27.8
44mm (GPS): 32.9
44mm (GPS + Cellular): 33.0
Water resistant
Yes - 50m
Dust resistant
Yes - IP6X
Connectivity
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Wi-Fi
Yes - 4
Bluetooth
Yes - 5.3
Processor
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Model
S8 SiP with 64‑bit dual-core
Display
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Pixels per inch
326
Display type
Retina display
Brightness
Up to 1000 nits
Network
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VoLTE Roaming (4G calling abroad)
Yes
VoLTE (4G calling in UK)
Yes
Sensors
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Accelerometer
Yes
Digital compass
Yes
Gyroscope
Yes
Ambient light sensor
Yes
Heart rate sensor
Yes
Memory
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Device memory
32GB
Features
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Activity app
Yes
Navigation
Yes
Apple Pay
Yes
Built-in Smart Assistant
Yes - Siri
Messages & calls
Yes
App notifications
Yes
Speaker and microphone
Yes
eSIM compatibility
No
Warranty
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Device warranty
24 months
Face features
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World clock
Yes
Alarm
Yes
Custom faces
Yes
Timer
Yes
Stopwatch
Yes
Calendar
Yes
Weather
Yes
Control method
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Digital crown
Yes
Side button
Yes
Touchscreen
Yes
Key Information
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Operating system
watchOS 11