Infrared High Power 40Mil LED Diode Wavelength 850nm (20 Pack) 850nm Wavelength , Whole pack is 20pc 60 degree beamwidth DIY to replace IR Diode by yourself for CMVision IR ILLUMINATOR VF : 1.7 - 1.8 V Infrared LEDs are used for remote controls (they're the little LED in the part you point at your TV) and 'night-vision' cameras.