WiFi Rechargeable Pet Fence

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The shape of the signal is in a perfect circle and the shape cannot be altered. The range of the Instant wireless fence can be increased by using two or more transmitters. The Wireless pet fence offers twice the coverage of any other wireless system on the market, so don't be fooled by the imitators.

http://www.petstreetmall.com/Perimeter-WIFI-Dog-Fence/8668/3697/details.html

Wireless Dog Fence and with FREE SHIPPING on the Petsafe Wireless Fence.