ALEKO TS-DF06 In Ground Radio Fence For Your Dog Train Your Pet Safely Pulsed proportional stimulus ----- The closer your dog gets to the boundary, the stronger the shock gets Most reliable, cost-efficient pet fence containment systems available, Adjustable nylon receiver collar; Longlife Battery included Low battery consumption Speed detection anti-run through Audible wire break alarm Visual wire break alarm Variable field width control 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. When the dog comes close to the boundary, the system will issue a warning tone first (2 meters close to the boundary), then a small shock stimulus after 4-10 seconds. If the dog continues to move closer to the boundary, the shock stimulus will increase