Review on eFamily Enhanced Edition Activity Fitness Tracker Christmas Gifts, Heart Rate Monitor Arm Band, IP67 Waterproof Smart Fitness Band, Smartphone ANT+ Pairing Armband for Kids, Women, and Men by Tammy Freeman

Received this today. After charging I synced it with my Bryton GPS. This took about two minutes. That same night, I took a 30-mile group ride in the Phoenix heat. Lots of sweat to challenge this thing. He worked like a champ, no wrong readings, he was consistent the whole time. After the first day I am very satisfied and impressed. The screenshot shows my heart rate during the climb to the top of the day. This allows you to see how reliable the readings were when the intensity was at its highest.