Apple Watch Series 2 (42mm) vs Apple Watch Series 7 (45mm) Specs Comparison

Availability

Officially announced
	Sep 14, 2021

Design

Dimensions
1.67 x 1.31 x 0.45 inches 42.5 x 33.3 x 11.4 mm
Weight
1.85 oz / 52.4 g	1.34 oz / 38.0 g
Materials
Frame: Stainless steel	Back: Aluminum
Resistance
Water	Water, Dust; IP6X
Colors
Silver, Black	Midnight, Starlight, Green, Blue, Red

Display

Size
1.6-inch, 60.71% screen-to-body
Type
OLED, 1000 nits	OLED
Resolution
390x312px, 303 PPI	448x368px
Features
Pressure-sensitive, Ambient light sensor

Hardware

System chip
Apple S2 (16 nm)	Apple S7
Processor
Dual-core 780 MHz Cortex-A7	Dual-core
GPU
PowerVR G6200	PowerVR
Memory
0.5GB/8GB	1GB/32GB
Storage expansion
not expandable	not expandable
OS
watchOS (6.x, 5.1, 5, 4.x, 3.x)	watchOS (9.x, 8.x)

Battery

Type
334 mAh	Li - Ion
Charging
Magnetic charging	Qi wireless charging

Connectivity & Features

Bluetooth
4.0	5.0
WLAN
b,g,n 802.11 b, g, n	b,g,n 802.11 b, g, n
Sensors
Accelerometer, Gyroscope, Heart rate, Ambient light sensor	Accelerometer, Gyroscope, Altimeter, Compass, Heart rate, Barometer, Blood Oxygen
Location
Glonass, Galileo	A-GPS, Glonass, Galileo, BeiDou, QZSS
Other
NFC

Multimedia

Speakers
Loudspeaker	Loudspeaker
Additional microphone(s)
	Yes

Cellular

3G Bands
	1, 2, 4, 5
Data Speed
	LTE-A, HSDPA+ (4G) 42.2 Mbit/s
SIM type
	eSIM

Alternative variants

With aluminum frame

Weight	1.21 oz / 34.2 g
Materials	Frame: Aluminum

With Stainless Steel case

Weight	1.82 oz / 51.5 g
Materials	Back: Stainless steel

With titanium case

Weight	1.59 oz / 45.1 g
Materials	Back: Titanium

Discover more

Full Specs Apple Watch Series 2 (42mm) Specs

Full Specs Apple Watch Series 7 (45mm) Specs PA Review Apple Watch Series 7 (45mm) Review