BH-20 Heart Rate sesor
The heart rate sensor allows you to connect to any Bluetooth Smart Ready device such as a smart-phone and lets you view and store the heart rate data based on a compatible app.
* Uses Bluetooth 4.0 Low Energy (BLE) technology
* Sensor: 62.15 x 33.6x 14 mm/19g
* Battery type: CR2032
* Battery life: approx. 2 years
(1 hr. per day)