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Amazfit GTR 4 debuts for €199.99 with new BioTracker 4.0 PPG optical sensor and dual-band GPS - NotebookCheck.net News
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Amazon.com: Amazfit GTR Mini Smart Watch for Men,14-Day Battery Life, Sports Watch with GPS, 5 Satellite Positioning Systems, Fitness Health Tracker with Heart Rate, SPO₂ Monitoring,5 ATM Water Resistance, Black : Electronics
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