ITEM NAME:1PCS Digital 38KHz IR Receiver For Arduino Compatible Z a.imagelink a:hover.imagelink {color:#db3606;.38KHz IR Receiver Sensor pin definitions : (1) Output (2) Vcc (3) GND. 1ã€Based on the 38KHz IR Receiver Sensor. 5ã€Modulate Frequency : 38Khz. 7ã€Can be compatible with Wrobot Digital 38KHz IR Transmitter Sensor.