Bluetooth Fitness Bracelet with Heart Rate Meter Pedometer

On the heart rate monitor works:
human blood color is determined by the oxygen content in the blood, and each heartbeat will make blood oxygen content increased, after the body consumes oxygen content of the blood will reduce, so the color of the blood due to changes in the oxygen content produces a periodic change. When your finger across in front of the camera phone, cell phone program will observe the changes in the color of blood and then make a high precision measurement. This program relative to traditional testing methods, it is to save time and can be used at any time.

Bluetooth Fitness Bracelet with Heart Rate Meter Pedometer