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.


Help us make it better

Welcome to the new documentation system of Seeed Studio. We have made a lot of progress comparing to the old wiki system and will continue to improve it to make it more user friendly and helpful. The improvement can't be done without your kindly feedback. If you have any suggestions or findings, you are most welcome to submit the amended version as our contributor via Github or give us suggestions in the survey below, it would be more appreciated if you could leave your email so that we can reply to you. Happy Hacking!