315MHz RF Transmitter Receiver Module Wireless Link Kit for Arduino

Not every wireless link needs the complexity or power draw of Wi-Fi or Bluetooth, and this matched 315MHz transmitter-receiver pair covers the simpler end of that need, a basic wireless link for toggling a relay remotely, reading a sensor across a room, or any other low-bandwidth signal that just needs to get from one Arduino-compatible board to another. Being sold as a matched kit means both ends are already tuned to work together, with no separate pairing step required.