Light refraction device

A stealth device created by Harold Lillja, which temporarily causes the user to appear invisible or see-through. He first attempted to show the device to others at the New World Expo, but was ironically not seen demonstrating its abilities. He later used the light refraction device to fight Donatello, and then to fight Baxter Stockman, though he suffered from the drain on his own energy.

During the City Fall arc, April used the device to infiltrate the theater where Shredder's demonstration was being held, in order to attack Bebop and Rocksteady unaware.