It looks like you're from the US.
We have a American shop which you can
purchase from if you'd like.
It's at: https://us.energenie4u.co.uk
Transmitter supply voltage: 5V (min, 2.5V, max. 5.5V)
Transmitter supply current: max. 250mA
Transmitter output wavelength: 940nm, 1x narrow angle IR LED, 1 x wide angle IR LED
Receiver supply voltage: 3.3V (min 2.7V, max. 5.5V)
Receiver supply current: Max. 0.5mA
Receiver carrier frequency: Center frequency 38Khz