- Holds a charge for a long time; Interesting statistics of heart rate and sleep, motivates for healthy living; Works without glitches; Accurately measures the pulse up to 120 and the level of O2 in the blood (there is a nuance in the pulse - see Comment); You can upload heart rate statistics with minute values Many additional functions: training, stress, breathing, control of the camera and phone music, etc. An interesting option is to enter the VTB application online using a bracelet (bluetooth tag)
- Inaccurately measures heart rate above 120 and does not allow you to get RR intervals
- quantity function
- often incorrect heart rate measurement