Electronic animal restraining device that generates precise electrical pulses. Acting on the nervous system, Stockstill "Locks up" the skeletal muscles making the animal ridged. it is believed also to have a blocking effect on pain signals to the brain. Recovery is virtually instant and the animal appears to be unaware. Output current is externally adjustable. Powered by one 6-volt torch battery. kit includes Stockstill power unit, 6v battery, needles electrodes x 2, output lead, output lead extension, demonstration video, 12 months warranty. Supplied in a handy carry case.