The module is a pair of RF 433 Mhz RF transmitter and receiver  with Encoder HT12E & Decoder HT12D ICs. The entire module is quite easy to use and is compatible with most of the  Arduino/Raspberry Pi, PIC boards -  4 bit data mode
 
Features RF Encoder Decoder Module Board:-
 
Breakout pins for connecting to the microcontroller.
DIP Switch for Address Selection 
Status LED for valid transmit.
Supports both ASK, FSK RF modules
 
Package Content:-
1 RF encoder and Decoder boards with HT 12E / 12D IC chips. + Rf 433Mhz Tx RX