Expand your Dogtra E-Fence 3500 with the Add-A-Collar, perfect for containing even the most stubborn dogs. Keep your furry friends safe with this effective underground containment system, designed for both mild and stubborn personalities. (Fur real, it's pawsitively a must-have!)

Features:

• For Dogs as small as 15 lbs.
• EZ coding for extra receivers
• Fully waterproof receiver/collar
• 2-Hour rapid charge batteries