Also known as a smart holster, this is a hip-worn device that is keyed to its owners bio-electric field. When someone other than the weapons owner tries to take the weapon from the holster, the holster locks the weapon in place, making it impossible to remove. The bioholster includes a motion-detection release system that aids fast-draws; when the user's hand approaches in the characteristic draw motion, the holster releases the weapon just in time tor the user to catch and aim it without breaking his motion. Smart holsters can be modified to carry melee weapons. but the fast-draw feature only works with small weapons such as pistols, knives, and daggers.