Control two dogs. Working range of 400 yards. Fifteen different levels of impulse. Continuous and flash impulse. Beeper function. LCD display. Magnetic on-off switch. Internal 3 volt lithium battery. Fully waterproof. Limited lifetime warranty. Made from metal and plastic. No assembly required. 1 in. L x 2.1 in. W x 2.1 in. H (1.2 lbs.) Additional collar for the Canicom 400 remote trainer.