DM3004XW-20 MULTIVET Radio force with stubbom dog receiver – The Radio Fence helps stop your pet from begging at the table, running out the from door, jumping on the counter, and more. Simply plug in the unit nearthe area you want to protect and adjust the range from as little as 2 feel to upto 12 feet. When your pet gets near the signal a waming beep sounds on the oollar. If he continues to approach the protected area. a mild correction is given.