This is one prop that, ironically, no film lover can ever forget...
In the highly popular MEN IN BLACK movies, the MIB forces employ many exotic alien weapons and devices in their battle against interstellar evil. One of these devices is the powerful, though non-lethal, "Neuralyzer" - an ordinary appearing silver cylinder (not that much bigger than a pen) that belies its incredible functionality. With it, a MIB field agent can selectively erase the memory of any individual or group. As a precaution, the MIB agent must always wear special issue glasses while using the device to protect against the flashing, memory-erasing light of the "Neuralyzer."
Several "Neuralyzer" props were created for use in MIB and MIB II, each with slightly different details than the others. A careful observer may notice that in the MIB the "Neuralyzer" that Agent K used was fairly different from the unit employed by Agent J. In MIB II the "Neuralyzer" used by Agent J was fairly similar to the one he used in the first film with the exception of the top light, which was changed from red in MIB to blue in MIB II. Other minor detail changes were also made to the body of the prop.
Master Replicas chose to replicate the "Neuralyzer" prop that was used by Agent J in MIB II.
Sony Studios loaned the original prop to Master Replicas for use as a reference when creating the replica. Hundreds of measurements and photographs were recorded to ensure that their replica was an exact match to the one seen in the movie. During their study of the prop, MR discovered that many of the functions seen in the movie were actually visual or sound effects added in post-production. In order to replicate the functionality of the device seen on-screen, the Master Replicas engineers incorporated several light and sound features into the replica that the original prop didn't have. They added a Xenon strobe flash, click detents on the setting dials, and original sound effects recorded directly from the studio DAT (Digital Audio Tape).