Small and unassuming, the vibro-knife consists of a handgrip with an embedded power cell, an adjustable sheath, a retractable belt loop on the butt of the handgrip, and extending out of the hilt is the shiny metal blade. A power cell supplies energy to an ultrasonic vibration generator, which propels the cutting blade through thousands of microscopic vibrations per second. The result is a hand weapon that is significantly more dangerous than its unpowered counterparts.