heart rate signal switching moudle HRM-4509 DIY with the heart rate moudle can work with USB heart rate sensor

heart rate signal switching moudle  HRM-4509

It includes

> signal and power connector

> heart rate signal output

> positive pole+ (2.6V---5V)

> negative pole-

Dual track socket connect with heart rate sensor (2511A,2511B,2511E)

      

      

HRM-2511A

HRM-2511B

HRM-2511E