A Taser Stun Master, similar to the one seen in Die Hard 2.
A Taser is an electric-charged weapon used by law enforcement to handle situations that go out of control.
Die Hard 2[]
In the film, an old lady on board Northeast Airlines 140 possesses a taser in her bag. Sitting next to Holly Gennero, she tells the former about how she once tried it out on her dog and it limped for a week.
Near the end of the climax, Holly borrows the old lady's taser since she was asleep, and uses it on Richard Thornburg to stop his broadcast (which caused a panic at Dulles International Airport).