DESC: Radio Frequency (RF) operation provides up to 100' range though walls, floors and doors, indoors or outdoors. Self-adhesive emitters affix to the infrared sensors on the front panels of your components. The emitters relay IR commands to components out of sight to the MRF-250's/MRF-300's RF base station front blaster. The emitters plug in to the MRF-250's/MRF-300's RF base station rear flasher line outputs via their 10 foot cables. Six flashers with visual feedback are included with each MRF-250/MRF-300 RF base station