Overally , it is elegant and nice look bracelet , but HR , BPM and Oxygen level does not always work .
The are two bright spots on the bottom to measure but only one is working .
Do not know whether this is the reason .
Good app provided
KALOAD BL Pulsera Inteligente Corazón Presión arterial de oxígeno Monitor Impermeable Pulsera
4 / 5