You'll need a small phillips head screwdriver and a flat blade (blunt is better so you don't damage the case/feet)
I tested about 12 feet max range through one wall before, and over 25 feet through two walls after. I also had great success with turning the device upside-down, which extended the range to the entire house through any walls.
It should all disassemble easily, prying glued parts off of each other should be done slowly and carefully. Haste does not pay off in a 10 minute job, as cracking the casing won't make you feel good.