The Amazfit GTR 2 Smart Watch Model A1952 is a feature-packed wearable device that comes in Thunder Black color and a 46.4mm case size. It runs on Amazfit OS and is compatible with both iOS and Android operating systems. The watch has a Blood Oxygen Sensor, Sleep Monitor, Music Player, and Heart Rate Monitor. It also has Alexa and GPS functionalities. The watch has 3 GB of storage capacity and a plastic band material.