US Patent 7586733 Systems and methods for immobilization with time monitoring

An apparatus for impeding locomotion by a human or animal target conducts a current through the target. The apparatus includes a trigger, a circuit, and a display. The trigger provides a signal. The circuit, responsive to the signal, provides the current for an interval as a series of pulses, and that tracks a remaining time of the interval. The display provides a presentation in accordance with the remaining time. The presentation may include a decreasing digital count.