The revolutionary Gibson Robot Les Paul Studio Limited Electric Guitar has some groundbreaking controls at your disposal. At first glance, the four control knobs seem to be indistinguishable from those on other Les Paul guitars. But look again. While the knobs do provide the standard tone and volume controls for each of the two pickups, the Multi-Control Knob (MCK) — the one with the illuminated top — serves as the master control for all aspects of the Robot Les Paul Studio Limited’s amazing self-tuning system. Which is kinda fun when you think about it.