Updated : Jan 17, 2023, 6:40 AM

Apple Watch Series 4 (40mm)

Full Specifications

Released · September 2018

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The Apple Watch Series 4 (40mm) is most commonly compared with these phones:

Design
Dimensions	1.57 x 1.34 x 0.42 inches 40.0 x 34.0 x 10.7 mm
Weight	1.06 oz (30.1 g)
Materials	Frame: Aluminum
Resistance	Water
Colors	Silver, Black
This device has different variants: View all

Display
Size	1.6-inch, 57.48% screen-to-body
Type	OLED, 1000 nits
Resolution	394x324px, 325 PPI
Protection	Sapphire
Features	Pressure-sensitive, Scratch-resistant glass, Ambient light sensor

Hardware
System chip	Apple S4 (7 nm)
Processor	Dual-core
GPU	Apple G11M
Memory	1GB/16GB
Storage expansion	not expandable
OS	watchOS (9.x, 8.x, 7.x, 6.x, 5)

Battery
Type	225 mAh
Charging	Magnetic charging

Connectivity & Features
Bluetooth	5.0
WLAN	b,g,n 802.11 b, g, n
Sensors	Accelerometer, Gyroscope, Heart rate, Barometer, Ambient light sensor
Location	Glonass, Galileo, QZSS
Other	NFC

Multimedia
Speakers	Loudspeaker
Additional microphone(s)	Noise cancellation

Cellular
Data Speed	LTE, HSPA
SIM type	eSIM

Alternative variants

With stainless steel case

Differences from the main variant:
Weight	1.40 oz (39.8 g)
Materials	Frame: Stainless steel

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