Taser is a line of handheld conducted energy devices (CED) sold by Axon Enterprise. The device fires two small barbed darts intended to puncture the skin and remain attached to the target until removed by the user of the device. The darts are connected to the main unit by thin wires that achieve a high dielectric strength and durability given the extremely high-voltage electric current they conduct, which can be delivered in short-duration pulses from a core of copper wire in the main unit. This enormous rush of voltage into the body produces effects ranging from localized pain to strong involuntary long muscle contractions, causing "neuromuscular incapacitation" (NMI), based on the mode of use and connectivity of the darts. When successfully used, the target is said to have been "tased".