PetSafe Big Dog Remote Training Collar for Medium and Large Dogs over 40 lb. with Tone and Static Correction, Waterproof, Up to 100 Yards of Range, Electronic K-9 E-Collar 100 YARD RANGE - great for indoors and smaller outdoor spaces 16 ADJUSTABLE LEVELS - static stimulation and 1 tone (beep) level to teach commands and correct behavior BOOST BUTTON - for situations where you need your pet to "stop now" WATERPROOF COLLAR - for all of your dog's outdoor activities BATTERIES INCLUDED - system requires four PetSafe's RFA-35-11 batteries FITS DOGS OVER 8 lb. - good for dogs of all sizes; Fits neck sizes up to 28" Call, chat or email with our expert PetSafe US-based customer care specialists six days a week; They are waiting to assist you and your pet with your product needs at 1-800-732-2677 or by email at ccc3@petsafe.net Manufacturers warranty is only valid when purchased from an authorized retailer