Active Containment System Add-On Dog Collar Receiver The twisted wire carries the

The twisted wire carries the signal from your transmitter box out to the main loop but stays neutral and allows your dog to cross over without correction (without the twisted wire your dog would not be able to cross the line that runs from your transmitter out to the boundary loop)

Due to this feature

or places that have a rainy climate

Our dog door flaps fit securely onto our solid aluminum frame

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Active Containment System Add-On Dog Collar Receiver The twisted wire carries the*Wall Transmitter not included. 8 Correction Levels 00 = Tone Only Mode (for Training) 01 = "Extra Low" Statically Set Correction Level 02 = "Low" Statically Set Correction Level 03 = "Medium" Statically Set Correction Level 04 = "Medium High" Statically Set Correction Level 05 = "High" Statically Set Correction Level 06 = Low Progressive Correction Level (1, 2, 3) 07 = High Progressive Correction Level (3, 4, 5) 100% Waterproof This collar is not