Free FlashLight - LED Light

Flashlight features:
► Small size
► Free
► The brightest, fastest, and most handy LED flashlight!
► The Flashlight takes full advantage of the LED light!
► Most elegant design and the fastest startup
► Health check by camera LED light
► Blood pressure measurement by flashlight
► Heart rate measurement by flashlight
► SpO2 measurement by flashlight

With the flashlight as a light source, put your finger lightly on the camera,then 4Free can capture the pulse of the blood capillary.

Collected by a photoelectric pulse wave signal stability, 4Free Health could get heart rate, blood pressure, blood lipids, blood oxygen and other physical parameters of the pulse wave analysis.