Amazon.com: Amazfit Band 5 Activity Fitness Tracker with Alexa Built-in, 15-Day Battery Life, Blood Oxygen, Heart Rate, Sleep & Stress Monitoring, 5 ATM Water Resistant, Fitness Watch for Men Women Kids, Black :
Amazon.com: Amazfit GTR 2 Smart Watch for Android iPhone, with Alexa GPS, Fitness Sports Watch for Men, Bluetooth Call, 14-Day Battery Life, 90 Sports Modes, Blood Oxygen Heart Rate Tracking, Waterproof, Sports :
Amazon.com: Amazfit GTR 3 Smart Watch for Android Phone iPhone with Alexa, GPS Fitness Tracker with 150 Sports Modes, 21-Day Battery Life, 1.39” AMOLED Display, Blood Oxygen Heart Rate Tracking, Waterproof, Black :