The JOHANNE HORSEWHISPERER PRO 2 : COMPLETE KIT is the advanced 2-way instruction system with the newest technology. The PRO 2-system makes it possible for instructor and rider to communicate 2-WAYS with each other, which is great for intense training without distractions or for competition purposes. Discrete and precise communication is critical at these moments. Superior long-range use (up to 150 meters) and no interference with other instruction devices.