I want to get a Joye 510 for my husband, but on the website they include things in their kits I have never heard of. What is a usb passthrough and a PCC? Should I just get the basic no box? It's pretty inexpensive. Where do I get more batteries or longer lasting ones? I'm on information overload, especially after researching this stuff for the last two days. I'm reading the EFC library right now, but I want to order tonight and would like to get these questions out of the way. Thanks for any input.