The OBD-BT adapter does basically what it should. Compared to an earlier product of other manufacturer, this is very small and fits now available without an extension cable, etc. on the OBD interface behind the flap in the interior, which can be now closed. Since the adapter is switched off in addition, he also does not suck at parked vehicle on the battery! Unfortunately, he sometimes turns off during operation by itself. But that is not reproducible - and not apparent why. I have now asked the data collection and transmission to slow, since I had no mistakes - only * for * I have an adapter that advertises especial faster data acquisition / transmission?