Updated : Jan 17, 2023, 6:40 AM

Apple Watch Series 4 (40mm) Specs

Released

September 2018

Display

1.6-inch
394 x 324 px

Battery

225 mAh

Storage

16GB

Hardware

Apple S4
1GB RAM

OS

watchOS 9.x

Description

The Apple Watch Series 4 (40mm) comes with 1.57-inch OLED display and Apple S4 processor. Specs also include heart rate sensor, barometer and LTE connectivity.

I want it 0 users

I have it 0 users

I had it 0 users

Popular Comparisons

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

Specs

Display
Size	1.6-inch
Resolution	394 x 324 px, 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, not expandable
OS	watchOS (9.x, 8.x, 7.x, 6.x, 5)
Device type	Smartwatch

Battery
Capacity	225 mAh
Type	Not user replaceable
Charging	Magnetic charging

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

Cellular
Data Speed	LTE, HSPA
SIM type	eSIM

Multimedia
Speakers	Loudspeaker
Additional microphone(s)	Noise cancellation

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

Despite our efforts to provide full and correct Apple Watch Series 4 (40mm) specifications, there is always a possibility of admitting a mistake. If you see any wrong or incomplete data, please

LET US KNOW.

If you are interested in using our specs commercially, check out our Phone specs database licensing page.