Linux command that tells you your mouse's DPI?

Hi,

I'm looking to find out whether there is a command in Linux that will tell me the current DPI of my USB mouse.

I used RazerCFG to lower the high sensitivity of my Razer DeathAdder Black Edition gaming mouse on a previous Ubuntu install. Now I'm just wondering whether the new DPI has been saved onto my mouse's onboard memory or not. It feels a lot slower (which is good!), but that could be because my mouse pointer speed is tued all the way down in System Settings.

I'm on Ubuntu 14.04.4, by the way.

Thanks!