The HDMI repeater will clean out the digital noise (sparkles) in your picture. The input of the HDMI repeater is connected with a long HDMI (male to male) cable from the HDMI device, such as, DVD player or Satellite set top box. The HDMI repeater output is connected to a second HDMI (male to male) cable to go from the output to any HDMI display or projector with a HDMI connector.