Underground Electric Dog Fence Waterproof Shock Collars for 3 Dogs

<p>Underground Electric Dog Fence Waterproof Shock Collars 2 OR 3 Dogs</p><li>When the dog comes close to the boundary, the system will issue a warning tone first, then a small shock stimulus after 4-10 seconds. If the dog continues to move closer to the boundary, the shock stimulus will increase.</li><li>Turing the field width knob clockwise on the transmitter increases the signal filed width; turning counter-clockwise decreases the signal filed width. It allows you to precisely control the width of the signal field.</li><li>Audible and visual wire-break indicators ----- When there is a wire break, the system will issue a loud sonic alarm accompanied by a flashing light.</li><li>Speed-detect anti run-through system ----- The faster your dog is moving, the quicker intensity increases.</li>

• Progressive tone stimulus
• Pulsed proportional stimulus
• The variable field width control