A Taser is an electroshock weapon that uses Electro-Muscular Disruption (EMD) technology to cause Neuromuscular Incapacitation or NMI an strong muscle contractions through the involuntary stimulation of both the sensory nerves and the motor nerves. The Taser is not dependent on pain compliance making it highly effective on subjects with high pain tolerance. For this reason it is preferred by law enforcement over traditional stun guns and other electronic control weapons. Currently there are two main police models, the M26 and X26. Both come with various accessories, including a laser sight and mounted digital video camera that can record in low-light situations. Taser International is also marketing a civilian model called the C2 model.