not trying to blow the deal with anyone but, i will let you know being as this is a usb TL it will not read under 120db so it cant be used for meca P&P.
sorry if that screws anyone up but i figured its something nice to know.
i know my tl has a cut off at 120, and the usb ones were actually only supposed to read down to 120, sounds like you got lucky. or maybe im just having an issue with mine.