Line6 Relay G90

The Line 6 Relay G90 provides a pure signal with absolutely zero compression! This means your guitar will retain it's sparkly top-end, and your bass will thump just like it should.
Its clarity rivals that of the highest-quality guitar cables. Instead of being transmitted as analog waves - which are prone to degradation and loss - the signal is converted to digital data at the transmitter and back to audio at the receiver. The result is no signal degradation, and no loss of either high or low frequencies.

This model has 12 possible channels and a range of 300 ft; it's a great, affordable wireless system that's built to professional standards.