The Petsafe PIG20-11041 fence is specially designed for small dogs.
The receiver is very small, lightweight and waterproof.
The electrostatic intensities are adjustable and tempered for small dogs.
The collar adjusts from 6 to 16''.
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4 levels of electrical correction
- Has an audible warning mode
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A low battery indicator.
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Alarm on transmitter if wire is cut.
- Integrated electrical overload protection.
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Covers a perimeter of 500 feet (150 meters)
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May cover more with purchase of additional cable
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This electric gate is designed for dogs 5 to 40 pounds. But also compatible with other PetSafe collars if you have a 2nd larger dog.
Additional collar for small dog:

Included: