This is a super long range 433mhz RF link kit Comes with VCO , PLL technology, steady Frequency and super anti-jamming ability. You can directly use it with your project like wireless data transport and remote control etc. Specification Working voltage: Receiver(3-5V), Transmitter(3-9V) Working current: 2.5mA(5.0VDC) principle of work: Superhet（VCO, PLL） Modulation: OOK/ASK Working band: 433.92MHz (customize service available) Bandwidth: 1.5MHz Sensitivity: -105dBm (50Ω) Rate: ＜5Kbps Decoding form：PT2272 Antenna length: 18cm Emission Distance: 2 KMExample