1. Range up to 5000 square meters. 2. Variable signal detective width to the boundary. Set the different distance to start to warning. 3. The closer to the boundary, the more intensity of static will be. 4. The faster your dog is moving, the quicker and higher intensity of static will be. 5. Audible and visual wire break indicators. Should the wire was broken, a loud sonic alarm will sound accompanied by a flashing light. 6. Water resistant collar with adjustable nylon strap. 7. Expandable to multi-dogs.(extra collar option) 8. Certificate: CE/RoHS