Weitech – Smart Pest Control A versatile range of effective repellents for controlling pests such as various insects, rodents, and animals. Weitech’s pest control products use technologies like ultrasonic waves to repel pests without chemicals. Ultrasound works by disturbing the pests’ senses, keeping them away from the protected area. Environmental friendliness and chemical-free solutions are key elements in the design of Weitech products. Weitech devices are designed for ease of use—they’re easy to install and require no special technical knowledge.