A projectile provides a stimulus signal through a human or animal target for immobilizing the target. The projectile includes a transceiver and a waveform generator. The transceiver receives a first signal and transmits a second signal. The waveform generator provides the stimulus signal through the target for immobilizing the target. The stimulus signal has a signal characteristic controlled by the waveform generator in accordance with the first signal. The second signal comprises a status of the stimulus signal.