The Axium EM series emitters needed to be small to match the IRFX3, so that is how we made them, tiny discrete and effective. Each model either uses a non blinking infra-red LED with high output or a visible red LED which has lower IR emission and the advantage of visible operation. Both the diode variants are available in a Dual or Single configuration. The emitters are housed in a miniture low profile plastic injection molded case with 3M adhesive applied to the back, with additional adhesive tabs provided in the packaging. As the use of a boot to cover the emitter can assist in preventing IR system issues, we provide one for each emitter.