The SportDOG Brand Contain-N-Train Systems collar receiver allows you to go anywhere for a training session and return to the containment area no collar changing required. The included remote trainer communicates with the collar receiver from up to 500 yds. away and gives you the capability to train with your choice of tone, vibration or static stimulation. System includes 1,000 ft. of wire and In-Ground Fence transmitter to create a containment area including up to 1.3 acres. Purchase optional Wire and Flag Kits (sold separately) to expand containment out to 100 acres. Collar receiver fits dogs 10 lbs. or larger Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Containment Systems.