This kit transmits a 40KHz modulated IR signal to a distance of 6 to 8 feet. Place the transmitter on one side of a doorway and the receiver on the other side to see if an object passes through. Can be used as a remote switch to turn objects OFF and ON by infrared. The IR receiver will only receive 40KHz modulated infrared light. You can configure the output for normally ON or normally OFF operation. This allows you to use it as a security sensor or as a remote control switch. You can use the receiver to test TV or VCR remote controls.

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POWER REQUIREMENTS: 8 to 10 Volts DC Transmitter SIZE: 1" x .75" Receiver SIZE: 1.4" x 1.2"