Features:

• 2-pack of 6-volt PetSafe lithium batteries
• For all PetSafe receivers that require 6-volt lithium battery module
• Products include the deluxe bark collar, standard bark collar, and more
• Batteries last for about 3 to 6 months
• Measures approximately 1-1/2 by 1-1/2 inches each

Editor Reviews:

Product Description:
2 Pack, 6 Volt, Lithium Battery Module, Works In The IF-275 & PUL-275.

Rating : - Long Life Batteries
These batteries came with the bark collars that we ordered. We ordered an extra set because we were worried the battery in each collar would run out quickly - NOT SO! We haven't even had to use the extra batteries yet because the original ones (same brand/type) are lasting so long!

Definitely recommend.