The Crowtail IR Emitter Infrared Emitter is an LED make from gallium arsenide ,with its color centered around 940nm. It's used to transmit infrared signals through an infrared LED, while there is an Infrared receiver to get the signals on the other side. https://elecena.pl/product/6057398/crowtail-ir-emitter-2-0 2016-05-07 https://elecena.pl/product/6057398/crowtail-ir-emitter-2-0 2025-12-17