eXtreme G2 Dog Training Collar with Remote for Dog Obedience Training Dogs and Puppies 25 to 100 lbs - 330 Yard Range w/ Multiple Training Modes DESIGNED FOR MEDIUM TO LARGE DOGS: If your dog weighs 20 pounds or more, this dog training collar is appropriate for him or her. This e collar fits dogs that have necks measuring between 7.87 inches and 27.5 inches. 1000-FOOT RANGE: This e collar for dogs has a range of up to 330 yards, which is about 1,000 feet. Our eXtreme dog training collar with remote offers 16 different levels of stimulation to choose from. THREE TRAINING MODES: We help tailor your e collar dog training experience with the help of 3 different modes to choose from. Select from Tone Only, Vibration Only, and Stimulation Only. COMFORTABLE DOG TRAINING COLLAR: This training collar is water resistant, and it is ergonomically designed to be safe and comfortable for your dog. EASY TO USE: The remote of this dog training collar is user-friendly, as it features a large, backlit LED screen for excellent visibility. Both the collar and transmitter of this e collar training system run on 2 standard AA batteries.