Applications include: Automotive key fobs, garage door remote controls, TV & Air Conditioner remotes etc. Frequency range: 10 - 1000 Mhz (confirmed by LCD screen). IR signal detector. Powered by a 9v (PP3) battery (not included). Part No. 8653 is a sensitive electronic sensor, for reliable results use away from other sources of interference like mobile phones, computer & routers etc.