RF Radio 1-Channel Wireless Data Transmitter Receiver:
This is a momentary mode device
For Rx there are 4 pins on PCB board.
Two pins in the center of the 4 pins are shorted as data output.
The pin closes to the edge/corner is GND pin.
The pin closes to the coil is the VCC pin.

Operating Voltage: 5V
Rx Steady Current: =<4mA
Tx Current: =<35mA when data freq is between 1K and 1MHz.
Sensitivity: -95dB
Antenna Length ca be 17cm long wire
Encode/Decode: Not available.