433MHz RF link modules for remote control applications.
Widely used in Arduino based projects.
Arduino tutorial available here
Voltage: 3.3V to 12V
Range: 20m to 100m (Dependent on voltage/siting/obstructions/antenna)
Transmitting Power: 10mW
Dimensions: 19mm x 19mm
Pinout: Data, Vcc, GND
Wire antenna can be soldered to the pad top right.
Dimensions: 30mm x 13mm x 9mm (WxDxH)
Pinout: VCC, DATA, DATA, GND
Wire antenna can be soldered to the pad next to the coil (lower left).
Note: the two data pins are connected together on the pcb.