Does iPhone 5 supports two bluetooth devices at the same time?

Hello all!

I have an iPhone 5 and bought one "JayBird BlueBuds X Premium Bluetooth Headphones" to use together with my "Polar WearLink®+ transmitter with Bluetooth®".

Alone, both of them works fine!

But when I try to use they together, it's like one is interfering in another.

The Polar App lose and recover the signal for just one second and when it happens, the music in my headphones fail also.

As they are different kind of devices I imagine they have to work together.

Does anybody had a similiar issue?
Is there any kind of configuration to solve it?

Regards!