4 Active Containment System Add-On Dog Collar Receivers Although the transmitter is very

Although the transmitter is very reliable

When you've successfully installed your units

Completely waterproof

and gave it their “Best of the Best” rating

Just to make sure you have everything you need

4 Active Containment System Add-On Dog Collar Receivers Although the transmitter is very*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