Who can't my S5 pair with Wearlink Bluetooth?

[AC Question]

I'm trying to use a Wear Link heart rate monitor for phones and apps together with my Galaxy S5 Active. The phone finds the transmitter but can't pair. What to do?

 

[B. Diddy]

Welcome to Android Central! Which model is it? Do you have to press any button on the WearLink to initiate the pairing?