2KM Long Range RF link kits w/ encoder and decoder

This is a super long-range 433mhz RF link kit. It comes with VCO, PLL technology, steady frequency and super anti-jamming ability. You can directly use it with your projects, like wireless data transport, remote control, etc.


Parameter Value
Working voltage Receiver(3-5V), Transmitter(3-9V)
Working current ≤2.5mA(5.0VDC)
Principle of operation Superhet(VCO, PLL)
Modulation OOK/ASK
Working band 433.92MHz (customized service available)
Bandwidth 1.5MHz
Sensitivity -105dBm (50Ω)
Rate <5Kbps
Decoding form PT2272
Antenna length 18cm
Transmission range 2 km

Application Ideas

  • Wireless switch
  • Remote transmission
  • Wireless control

Hardware Overview

Getting Started

  • Please follow the Instruction to hook up the communication system.
  • Connect battery, button and transmit boards.


Please use 3-5V power source! 9V will damage the receiver board.

  • Connect battery, LEDs and receiver boards.


Do not put RX module and TX module too close: this would prevent them to work. Make sure that the RX module and TX module are at least 1 meter away from each other.

  • When we press the button on the Transmitter side, the related LED on receiver side will be turned on.


Tech Support

Please submit any technical issue into our forum or drop mail to techsupport@seeed.cc.