OnePlus Open 2 vs Xiaomi Watch S4 Specs Comparison

Design

Dimensions
	1.86 x 1.86 x 0.47 inches 47.3 x 47.3 x 12 mm
Weight
	1.57 oz (44.5 g)
Materials
	Back: Aluminum
Resistance
Yes; IPX4	50m/5ATM water resistance
Biometrics
Fingerprint (touch)
Colors
	Black, Silver

Display

Size
7.8-inch	1.4-inch
Resolution
2268x2440px, 426 PPI	466x466px, 461 PPI
Technology
AMOLED	AMOLED
Refresh rate
120Hz
Peak brightness
	2200 cd/m2 (nit)
Features
Folding inside the device, HDR support, Ambient light sensor, Proximity sensor
Front cover display
6.3 inches 2484 x1116 px AMOLED 120Hz refresh rate, HDR support

Hardware

System chip
Qualcomm Snapdragon 8 Elite SM8550 (4 nm)
Processor
Octa-core
GPU
Yes
Memory
16GB/512GB (UFS 4.0)
Storage expansion
not expandable
OS
Android (15)

Battery

Type
5700 mAh	486 mAh, Li - Polymer
Charging
Fast charging Reverse wired charging
Charge speed
Wired: 67.0W

Camera

Rear
Triple camera
Main camera
48 MP (OIS, PDAF) Aperture size: F1.7 Focal length: 24 mm Pixel size: 1.12 μm
Second camera
48 MP (Ultra-wide, PDAF) Aperture size: F2.2 Focal Length: 14 mm Sensor size: 1/2" Pixel size: 0.8 μm
Third camera
64 MP (Telephoto, OIS, PDAF) Optical zoom: 3.0x Aperture size: F2.6 Focal Length: 70 mm Sensor size: 1/2" Pixel size: 0.7 μm
Flash
LED
Video recording
4K UHD (60 fps), 1080p (240 fps)
Front
32 MP Folded: 20 MP

Connectivity & Features

Bluetooth
5.3	5.3
WLAN
b,g,n,ac,Wi-Fi 6,Wi-Fi 6E,Wi-Fi 7,ad Wi-Fi Direct, Hotspot
USB
Type-C, USB 3.1
Sensors
Accelerometer, Gyroscope, Compass, Hall (for flip covers)	Accelerometer, Gyroscope, Compass, Heart rate, Blood Oxygen
Location
GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning	GPS, A-GPS, Galileo, BeiDou, QZSS
Other
NFC	NFC

Multimedia

Headphones
No 3.5mm jack
Speakers
Earpiece, Multiple speakers
Screen mirroring
Wireless screen share
Additional microphone(s)
Noise cancellation

Cellular

5G
Bands n1, n2, n3, n5, n7, n8, n12, n20, n25, n28, n30, n38, n40, n41, n66, n71, n75, n77, n78, SA, NSA, Sub-6
4G (FDD)
Bands 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 30(2300 WCS), 32(1500 L-band), 66(AWS-3), 71(600)
4G (TDD)
Bands 38, 39, 40, 41, 46, 48
3G
Bands 1, 2, 4, 5, 6, 8, 19
Data Speed
LTE-A, HSDPA+ (4G) 42.2 Mbit/s	LTE, HSDPA+ (4G) 42.2 Mbit/s
SIM type
Dual Nano SIM	eSIM

Links

Full specifications
OnePlus Open 2 Specs	Xiaomi Watch S4 Specs