I think the strap is the biggest weakness of this device. I always had 100% connectivity but was really struggling to get HR readings. I replaced the strap with a Wahoo Softstrap using the same buckles and it now works 100%. If you can get two pieces cheap enough, it's a good device. If you have an existing device and are having trouble, it might just be a strap.
Accurate No-Touch Thermometer For Adults And Kids With Fever Alert And Memory Recall
47 Review
Smart bracelet Xiaomi Mi Smart Band 5 Global, black
244 Review
Impressive IPROVEN BPM-417 - Digital Wrist Blood Pressure Monitor For Home Use - Large Cuff And Heart Rate Monitor - Real-Time BP Reading With Wrist Guide, Movement Sensor, And Backlight
42 Review
Smart bracelet Xiaomi Mi Smart Band 5 RU, black
148 Review