Amazfit GTR 4 Smartwatch, Dual-Band GPS, Alexa Built-in, Bluetooth Calls, 150+ Sports Modes, 1.43 Inch AMOLED Display Superspeed, Black

The smart watch's new BioTracker 4.0 PPG biometric sensor is enhanced to 2LED, enabling collection of 33% more data than the previous generation, and with improved accuracy.This sensor, combined with the samrtwatch's upgraded heart rate tracking algorithm, results in heart rate tracking that almost reaches the level of heart rate belts.

• TRA Certification: No
• Brand: Amazfit