Remote trainer with a range of up to 100 yards for dogs under 40 pounds * 10 easily adjustable levels of stimulation, from 400 volts to 6000 volts * Option for negative tone without correction and negative tone with correction * Low-battery indicator light; expanded training manual and batteries included * Transmitter measures 1 by 1-1/2 by 6 inches; receiver 3/4 by 2 by 1 inches; limited lifetime warranty