High Tech Pet Radio Collar RC-7 for Humane Contain HC-7000 Advanced Electronic Dog Fence Super System and RMT-1 Radio Mat Transmitter Pad Uses proprietary technology to automatically adjust stimulus intensity based on distance from boundary, keeping pet contained without overstimulation fully waterproof and comes with an attractive, yet ultra-tough poly-elastomeric strap Compatible with all Humane Contain electronic fence systems made by High Tech Pet Products Adjustable from 7 to 25-inch for all dogs 5-pound and up Comes with short hair and long hair probes