How to tell the difference between V1 and V2?

How do you tell the difference? The two I bought came with firmware 2.03.31 firmware. And then I upgraded to 2.03.33. I wanna try to put Rockbox on mine. Thanks.

You have a v2 model. If it were a v1, the firmware version would start with 1.

Ok. Thanks. That’s all I needed to know.