The Audio Technica Sistema 10 Inalámbrico Body Pack:   Get digital wireless access designed to empower musicians and presenters with these high-fidelity digital systems, featuring advanced 24-bit operation in the 2.4 GHz range. System 10 is perfect for public addresses, public houses, A/V rental, churches and temples, television and DTV interference. With just one button, the ATW-1101 automatically determines and adjusts the best available frequency (open channel). It is useful when using multiple Audio Technica Sistema 10 Inalámbrico Body Pack