2 pack of 6 volt PetSafe batteries.

Used in the following systems:

• Instant Fence (PIF-300)
• PetSafe Instant Fence Receivers (PIF-275-19)
• Standard Radio Fences (PRF-3004/W)
• Deluxe Radio Fences (PRF-304/W)
• PetSafe Stubborn Dog Receivers (PRF-275-19)
• PetSafe Ultralight Receivers (PUL-250)
• PetSafe Deluxe Ultralight Receivers (PUL-275)
• PetSafe Deluxe Bark Collars (PDBC-300)
• PetSafe Bark Control Training Systems (PBC-302)
• PetSafe Standard Bark Collars (PBC-102)
• PetSafe Ultralight Sonic Bark Collars (PUSB-300)
• SportDog Bark Controls (SBC-6)
• SportDog Deluxe Bark Controls (SBC-18)