Since the heart measuring system on my first purchased toy this month - Huami Amazfit Stratos 2 sports watch - is not so accurate, I decided to continue shopping for gadgets. So I purchased this device.

Berry King Heartbeat 2

This is a Bluetooth LE device which is an entry level gadget by price and good enough for me device when it comes to performance and accuracy.

Unboxing

First Usage

I connected the device minutes ago. I was a piece of cake. You just clip the sensor to the belt and put it on.

Front

Back

Then I opened GYM Rewards app and connected the band. It was paired immediately and my heart was officially beating.

First Feel

It's working out of the box without the need of any instructions. Good!

Let's see how many calories did I burn while sitting behind the computer and writing this report ...

The answer is 13:

Looks like I have a sub 60 Hz writing heart rate :)

Can two device be paired at the same time?

Let's try to connect Amazfit Stratos wile GYM Rewards app is still connected. No, the band doesn't show on the list when I scan the available accessories with the watch.

OK, stopping the app and scanning again.

Discovered:

Of course:

It's working:

I'll try the band for real tomorrow while on the charity run.