I unfolded the Razer Prio for the first time expecting the same compromise every mobile controller makes: full-size comfort or pocket-sized portability, never both. Closed, it's roughly the footprint of a credit card with a central rotation disk locking the halves together. Snapped open to its full length, it reveals full console-style controls: a tactile 4-way D-pad, silent face buttons, dual bumpers, analog triggers, and capacitive thumb sticks.