The PA-300 PetPal Dog Obedience Electronic Collar from D.T. Systems has a range of 300 yards, perfect for obedience training around the house and in the yard. This unit has 16 levels of continuous static stimulation with an eight-second safety cut-off. Its Training Tone "Beep" option provides non-static stimulation so that you can find the perfect level of correction for your pet. The easy-snap buckle collar is compact, waterproof, and adjusts from 7" to 27" for dogs approximately 5 lbs. to 120 lbs. A magnetic On/Off switch is built into the collar. The transmitter remote is water-resistant. The PA-300 features a battery saving mode and auto shutoff built into the system. The unit comes with a 6V battery for the collar and includes an extra in the box. The transmitter/remote takes a 9V battery (not included).