PetSafe Stubborn Dog Stay and Play Wireless Fence Receiver Collar, Waterproof and Rechargeable, Tone and Static Correction FOR STUBBORN OR HARD TO TRAIN DOGS - 5 adjustable levels of static correction plus tone only; highest intensity available RECHARGEABLE, WATERPROOF RECEIVER COLLAR - quickly charges in 2-3 hours with each charge lasting up to 3 weeks depending on use SLIM, ERGONOMIC DESIGN - fits pets 5 pounds or more with neck sizes 6 to 28 inches. Compatible with PetSafe Wireless Containment System (PIF-300 system, IF-100 transmitter) and Stay+Play Wireless Fence (PIF00-12917) CUSTOMIZE FOR YOUR PET - pass-through receiver collar allows you to use any non-metallic, 3/4 inch wide strap pet collar SHORT AND LONG CONTACT POINTS INCLUDED - for pets with long or short hair ADD UNLIMITED PETS TO YOUR SYSTEM - works with PetSafe Wireless Pet Containment Systems to keep your pets secure in your yard 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