SeeedStudios Long Range RF Link Kits w/ Encoder and Decoder

You want to make this thing talk to that thing waaay over there? Try the SeeedStudio super-long range 433Mhz RF link bundle! They're claiming 2KM range for wireless data transport & remote control use!

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Description
Documentation

SeeedStudio beats 433MHz into submission to create a super-long (up to 2KM / 1.25Mile) range link! Complete with VCO , PLL technology, steady Frequency and super anti-jamming ability, it's a usable pair of modules to create a wireless data transport or remote control!

Specification:

Working volt : 5V
Working current: ≤2.5mA(5.0VDC)
principle of work: Superhetï¼ˆVCO, PLLï¼‰
Modulationï¼šOOK/ASK
Working band: 433.92MHz (customize service available)
Bandwidth: 1.5MHz
Sensitivity: -105dBm (50Ω)
Rate: ï¼œ5Kbps
Decoding formï¼šPT2272
Antenna length: 18cm
Emission Distance: 2 KM
Finished, and ready to use!

Note: Do not warp the antenna or the module will be burned!

Documents
Please visit the wiki page for more info about this product. Feel free to help improve the documents, add more demo code or tutorials. For technical support, please post your questions to the Seeed forum.

Datasheet for PT2272 and PT2262