The primary cost difference between a wireless system and a hard-wired system relates to the high cost of wiring of the facility and future related wiring problems. For example, a 100,000 sq. ft. facility with 50 PA speakers will cost approximately $15,000 for system parts, and approximately $10,000 to wire the building. This represents a savings of 40% in the total project cost. Another cost-saving factor with a wireless system is that there is no need for expensive service calls for wiring problems or product relocation since it can be done easily by the end-user.