Multivet Virtual Barrier Indoor Spray System reciever - 1.9 x 1

The Spray Barrier training system has 2 components: an emitter dish and a spray receiver collar. The emitter dish is plugged into a regular household 120 VAC power outlet. It generates a low frequency radio signal that is transmitted in all directions. As your pet approaches the emitter dish, the spray receiver collar will pick up the low frequency signal. The collar will at first emit a warning beeping sound to let your animal know it has reached the limit. Should he continue on, he will then receive a brisk spray of citronella. Multivet's Spray Barrier must be used in conjunction with our spray receiver collars and citronella refills.