How do I choose between the 41mm and 45mm Pixel Watch 4 sizes?

Both sizes offer identical breakthrough features including satellite SOS, user-serviceable design, and Gemini AI coaching. The 45mm provides larger display and superior battery life (40 hours vs 30 hours), fitting wrists 150-215mm circumference. The 41mm offers classic, lighter profile fitting wrists 130-210mm circumference. Choice depends on display preference, battery needs, and wrist fit.

What breakthrough features does Pixel Watch 4 offer that competitors cannot match?

Four revolutionary capabilities no competitor offers: (1) Satellite SOS emergency communication enabling distress signals without cellular coverage, (2) User-serviceable design with replaceable battery and display components, (3) Actua 360 domed display with 3000 nits brightness, (4) Gemini AI personal health coach with 24/7 guidance and raise-to-talk activation.

Which phones are compatible with the Pixel Watch 4?

Compatible with Google Pixel and Android phones running Android 11.0 or newer. Optimal experience achieved with Pixel phones for exclusive satellite emergency communication, Gemini AI integration, and camera remote control capabilities. Google Account required for full feature access.

How does the satellite SOS emergency communication work?

Industry-first capability enabling distress signals and emergency service communication in remote locations without cellular or Wi-Fi coverage. Uses advanced satellite network technology with 2-year free service included and global coverage. Functions in areas where no other smartwatch can operate.

Is the Pixel Watch 4 water resistant?

Yes, features comprehensive water resistance with 50 meters (5 ATM) depth capability and IP68 protection. Supports ocean swimming, pool activities, showering, water sports, and complete submersion protection with Water Lock Mode for automatic water ejection.

How does the revolutionary repairability design work?

First user-serviceable Pixel Watch with replaceable battery and display components. Enables cost-effective maintenance at fraction of full device cost, supporting 5+ year usage with component replacement. User-accessible battery replacement takes 15-30 minutes with official kits. Display replacement available through professional service network.

What advanced health features are available on Pixel Watch 4?

Breakthrough Loss of Pulse Detection (FDA-cleared), Gemini AI health coach with 24/7 guidance, 18% more accurate sleep tracking, multi-path heart rate sensor, skin temperature monitoring, ECG readings, and continuous SpO2 monitoring. Includes 6-month Fitbit Premium trial for advanced analytics.

Do I need a phone to use the Pixel Watch 4?

Initial pairing requires compatible Android phone. LTE model enables independent operation for calls, texts, music, Google Pay, and Gemini Assistant. Bluetooth/Wi-Fi model requires phone proximity or Wi-Fi connection. Both models include satellite SOS emergency communication operating independently.

Does OnePlus Watch 3 Have ECG?

Name: Google Pixel Watch 4
Brand: Google
Availability: PreOrder
Rating: 4.8 (1250 reviews)

Yes, the OnePlus Watch 3 features ECG (electrocardiogram) monitoring capable of detecting irregular heart rhythms including atrial fibrillation (AFib) with 95-98% accuracy.

What ECG Detects

Sinus Rhythm (Normal): Regular heart rhythm 50-100 bpm
Atrial Fibrillation (AFib): Irregular rhythm requiring medical consultation
High/Low Heart Rate: Abnormal rate with regular rhythm
Inconclusive: Unable to determine - retake reading

ECG vs Continuous Heart Rate

Feature	ECG	Optical Heart Rate
Measures	Electrical signals	Blood flow (light)
Duration	60-second reading	Continuous 24/7
Detects	Rhythm irregularities	Heart rate & variability
Requires	Finger on crown	No action needed

Regional Availability

Available Regions:

United States (FDA cleared)
European Union (CE marked)
United Kingdom, Canada, Australia
Singapore, Hong Kong

Check Before Purchase: ECG may be disabled in unsupported regions.

How to Use ECG

Sit down and rest arm on flat surface
Open ECG app on watch
Touch finger to crown button
Stay still for 60 seconds
View results on watch

Medical Device Feature

The OnePlus Watch 3 ECG is clinically validated with 95-98% accuracy for AFib detection. Always consult a doctor if AFib is detected or you experience symptoms.

What ECG Detects​

ECG vs Continuous Heart Rate​

Regional Availability​

How to Use ECG​

Medical Device Feature

What ECG Detects

ECG vs Continuous Heart Rate

Regional Availability

How to Use ECG