Review on Wireless Underground Dog Fence System with Remote Dog Training Collar - Dual Function, Safe Containment, Waterproof Shock Collar - Pet Containment System with Extra Thick Durable Polyolefin 13 AWG Wire Fence by Patricia Perez

Unfortunately my return window is closed otherwise I would be returning this extra collar that I bought. The one that came with my system works great. That extra collar doesn't work very well. It shoots in spots in the yard where another collar would work great. It took us a while to install the fence, otherwise we would have known it wasn't working very well. Now I have to buy another one because we have a system and I like the system and the collar, it works really well.