the software is flawed, if only the name USB GPS is not in order, the software creates a virtual COM port. (Snow from the day before yesterday) The logger is not to connect to a PDA as well, the only software to read out the logger, configure and only works with Windows so la la. About USB is read nothing or to secure at least. Description also poor. So I can go change the confi only with a PC. As a data logger, the device works well, but with this bad software, it is not for me to use. The device specifications on the web site is partly false.