Need a help to find a long range Transceiver module

Hi,

I need a help to find a Transceiver module. which need to have a transmit range even 1Km or 2Km. Or else can I get this much of range by using an antenna ? if so which type of antenna is better ?

And also need to support multiple channels(8 channels are enough).

better if it has a SPI interface.but UART or USB also ok.

Regards to you all,

Kushan