Nervous? High pressure? Do you want to learn ZEN to relax yourself?
i-ZEN is a good helper to help you relax in life.
NOTE: i-ZEN can get your heart rate form compatible low-energy bluetooth (BLE) external hear rate sensor .
Nervous? High pressure? Do you want to learn ZEN to relax yourself?
i-ZEN is a good helper to help you relax in life.
NOTE: i-ZEN can get your heart rate form compatible low-energy bluetooth (BLE) external hear rate sensor .