Cool [Q] How to root bunbungame KALOS

I recently purchased bunbungame KALOS (Tegra 4) which is delivered with JB 4.2.2 with kernel 3.4.35-g08b9d2e .
I want to know if there is any kind of procedure/application that I can root KALOS.

If I root my KALOS I could connect and pair IPEGA-9025 gamepad with my tablet via bluetooth with applications such as BluezIME,Tincore keymapper and game controller 2.