SportDOG SDF-100A 100-Acre In-Ground Containment Fence PLUS Four FlexContact Flexible Contact Points, Two Replacement Batteries, & a Pet Emergency Contact Information Magnet - VALUE BUNDLE BigPet LittlePet VALUE BUNDLE Includes Four FlexContact, Comfortable Flexible Contact Points, Two Replacement Batteries, & a Pet Emergency Contact Information Magnet For Dogs 10lbs and up 4 stimulation levels to match any dog's temperament Waterproof receiver collar Anti-linger feature prevents dog from staying in warning zone until battery dies