Takes a long time held up detection

Good day,
was delivered as the belt I've created him directly and try to connect with my Sony Xperia Z.
This did not work on the first night. The next day I bought and installed a new battery.
Then I angeleggt the belt and after about 15 minutes he was also paired.
Trying to link the sensor to a Polar belt succeed right away, unfortunately, the pulse rate was twice as high as it actually is.
I have trained myself to Runtastic apply belt early and warm it with warm water. Then the connection is working quite quickly. Running he made no problems so far and provided the heart rate so far reliably.
A test with the Polar Bluetooth sensor worked better and was quickly coupled with the.

Had only the sensor of runtastic shall send back. Since I am a lazy person I adapted the sensor and can live with the waiting time of 10 minutes before going to run out.

In my opinion, is the theme of the slow coupling and error-free transmission to the belt as it quickly worked wonderfully with the Polar belt.
Anyone who has a Sony SmartWatch with coupled can breathe all devices work together and you can display the time on the clock.

Who wants to invest and get started should have recourse to the Polar device.

What bothers me in the app and the Bluetooth always must be enabled even if you want to run times without belt. Without Bluetooth no App for connection to a sensor.

I hope it helps a little further.

Best Regards