Line 6 Relay G90 digital wireless instrument system features Ccmpander-free operation that enables Relay to deliver a beautiful high-end sparkle, thunderous low-end punch, and touch response that analog wireless systems simply cannot deliver. Line 6 Relay G90 produces full-range tones with 10Hz-20kHz frequency response, exceedingly low noise with up to 120dB dynamic range, and studio-quality resolution with 24-bit A/D conversion. Relay G90 also features interference free operation and requires no user license.