Google Pixel Watch 4 (41 mm, Wi-Fi) / Samsung Galaxy Watch5 Pro (45 mm)

The 45 mm model weighs 36.7 g.

GIGAZINE gives the 41 mm model's resolution as 426 × 426.

The bezel is raised above the display, which Samsung designs to protect the glass from knocks. There is no rotating bezel; menus are navigated with touch gestures and the buttons.

The ability to drop to 1 Hz reduces the battery cost of the always-on display.

The co-processor handles notifications and sensor work while the screen is off without waking the main processor, saving battery.

The 45 mm model has a 455 mAh battery and up to 40 hours with the always-on display.

The watch sits in a new side-mounted dock; earlier Pixel Watch chargers do not fit this model.

ECG and some health features may be limited by country; readings are not a medical diagnosis.

Electrical Heart Signal enables ECG and Bioelectrical Impedance enables body composition estimates; ECG works through the Samsung Health Monitor app only in approved markets.

This entry covers the Wi-Fi model; LTE and UMTS cellular connectivity is only on the LTE model.

The LTE model can make calls and use data without the phone nearby; support depends on the carrier.

5 ATM suits shallow-water activities like swimming, not diving or high-speed water sports.

5ATM covers surface water use such as swimming, not diving or high-pressure water. MIL-STD-810H is the US military standard for environmental test methods.

Activation requires connecting to an Android phone with Google Mobile Services; it cannot be used with an iPhone.

Some features depend on the phone's Android version and the Pixel Watch app.

The D-buckle band folds open; because the watch cannot lie flat, it is charged on its side on the Samsung charger.

Samsung says real battery life varies with network environment and usage patterns. 590 mAh is about 44% larger than the 410 mAh battery in the 44 mm Galaxy Watch5.

Dimensions are measured without the health sensors and weight without the strap.