Seeed 433mhz rf transmitter and receiver link kits seeed studio 113990010 the 433mhz rf transmitter and receiver kit from seeed studio consists of one transmitter and one receiver and is useful for remote control projects that dont require two way communication to attach one of these modules to a microcontroller you need to supply power 33 to 6v dc and either a serial transmit or receive signal so its very light in terms of gpio pins seeed 113990010 433mhz rf transmitter and receiver