I have long wanted and decided after a tip from the gym for this Beurer belt. And it was right. Unwrapped, battery clean and off we went. Sync with the Technogym in the studio immediately. Bluetooth with my Samsung Galaxy S3 LTE 9305i was a weng tricky. When you turn on Bluetooth on the mobile phone does not see it as the belt BT device. The runtastic app (license for advanced feature was present) runs but was not synchronize the belt easily. The runtastic app offers to synchronize with a Runtastic heartrate belt or with another ... So I "other" is selected. .. Nothing happens. , Then times can search harness the runtastic. .. And lo and behold ... is possible! ! Sometimes it takes half a minute to phone the belt will but then it goes without problems. I do not regret the purchase. Whether additionally a heart rate monitor performs its function I do not know .. because no available. ;-)