The OnePlus Watch 4 46mm Midnight is a smartwatch that lets you track your daily activities and access smartwatch features on your wrist. It combines a round AMOLED display, GPS, and ECG tracking, so you can access time, movement, and selected health metrics right on your watch.

Key product features

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The 1.5-inch LTPO AMOLED display displays content on a large, round display. Up to 3000 nits of brightness is useful when viewing the screen in bright environments, and LTPO technology allows the display to adapt to the content being displayed.

Dual-frequency GPS receives signals on two frequency bands to determine location, and the watch also features ECG heart rate measurement. This means that the location function and measurement are available directly on the wrist, without the need to use the phone screen to display the data.

The Snapdragon W5 processor powers the watch, and the battery life is claimed to last up to 16 days. In practice, this means you don't have to plug it in every day to charge it; the actual duration depends on how you use the watch's features.

Property

Data

Type

Smart watch

Screen

1.5" LTPO AMOLED

Resolution

466 × 466 pixels

Luminosity

Up to 3000 nits

Processor

Snapdragon W5

Operating system

Wear OS

RAM

2GB

Internal memory

32GB

Connectivity

Bluetooth, Wi-Fi

GPS

Dual-frequency GPS

NFC

Yes

Heart rate measurement

Yes

Blood oxygen measurement

SpO2

ECG

Yes

Sleep monitoring

Yes

Stress measurement

Yes

Sports modes

More than 100

Battery

646mAh

Autonomy

Up to 16 days (economy mode)

Water resistance

5 ATM

Protection

IP68, IP69

Housing material

Titanium alloy

Charging

Magnetic charging