ITEM NAME:1PCS Digital 38KHz IR Receiver For Arduino Compatible MOJ Gw.38KHz IR Receiver Sensor pin definitions : (1) Output (2) Vcc (3) GND. 1〠Based on the 38KHz IR Receiver Sensor. 5〠Modulate Frequency : 38Khz. 7〠Can be compatible with Wrobot Digital 38KHz IR Transmitter Sensor.