Updated : Jan 17, 2023, 6:40 AM

Apple Watch Series 4 (40mm)

Full Specifications

Released · September 2018

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$949

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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
Resolution	394x324px, 325 PPI
Technology	OLED
Screen-to-body	57.48 %
Peak brightness	1000 cd/m2 (nit)
Features	Pressure-sensitive, Scratch-resistant glass (Sapphire), Ambient light sensor

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

Battery
Capacity	225 mAh
Charging	Magnetic charging

Connectivity & Features
Bluetooth	5.0
Wi-Fi	802.11 b,g,n
Location	Glonass, Galileo, QZSS
Sensors	Accelerometer, Gyroscope, Heart rate, Barometer
Other	NFC

Multimedia
Speakers	Loudspeaker
Additional microphone(s)	Noise cancellation

Cellular
Data Speed	LTE, HSPA
SIM type	eSIM

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