Petsafe Wireless Fence Collar - Waterproof Receiver - 5 Adjustable Levels of correction. - PIF-275-19 - Bonus 2 Batteries The PetSafe Wireless Fence Collar should be used for dogs that are 8 pounds and up. Fits neck sizes 6-28 inches. Waterproof receiver. Compatible with PetSafe Wireless Containment System (PIF-300 system, IF-100 transmitter) and Stay+Play Wireless Fence (PIF00-12917). 5 adjustable levels of correction.Tone-only mode alerts your pet with a beep. Add an unlimited number of pets with additional wireless receiver collars. 6 Volt Battery Included ( RFA-67D). 2 Extra Free Batteries Included with this package. Lightweight 2.5 ounce receiver that's only 2 1/4"W x 1 5/8" D x 1" H . Low battery indicator (light will flash every 4 to 5 seconds)