While cost will likely be a major factor in selecting a company or technician to conduct a professional TSCM bug sweep services, having the right equipment, training, and experience is more important. What good is it if you get a low price because they are using a cheap “spy shop” RF (radio frequency) detector that may only be able to detect RF bugging device only if its on? But, what if the device is off or was remotely turned off? That device would be worthless. Fortunately, professionals use tools that will detect bugs that are on or off.