Q: Is the cable detachable?
Q: Is the backlight RGB?
A: No, it's "rainbow light", each row with a different static color.
Q: Is this price reasonable?
A: IMHO, no. You can get the same board on Amazon for $65 w/ free prime shipping and get it in 2 days, vs. waiting a month or more for this thing to ship. I am not linking to it, but you can easily find it on Amazon as "team wolf CIY keyboard", with choice of red / blue /...