I use it for BBT for fertility tracking. I didn't realize it didn't have a backlight, so when I wake up early, I have to use my phone screen light to read the temperature. But other than that, does the trick, it comes with a spare battery and you can't beat the price.
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 Global, black
244 Review
Accurate No-Touch Thermometer For Adults And Kids With Fever Alert And Memory Recall
47 Review
Smart bracelet Xiaomi Mi Smart Band 5 RU, black
148 Review