[MrForbes]

It would help if you'd give us a better idea of what you're trying to do.

There are 2.4ghz wireless "baby monitor" video systems you can buy at retail stores.

The vex transmitter/reciever and signal splitter is a low cost way to get independent control of 4 motors, although you need to add 4 speed controllers (banebots sells some of different current ratings). If you just need small motors you could use vex motors (they are essentially a servo with no stop)