Musicians want freedom when playing their instrument - freedom to express themselves and freedom to move. But when it comes to miking instruments it usually means being tethered down by audio cables.With the U-Series Wireless Instrument System you don?t have to sacrifice your freedom anymore.The wireless transmitter easily attaches to your instrument and can run up to 12 hours on a single AAA battery. The sturdy base receiver can run on AC power or batteries for unlimited placement options. The diversity receiver design protects against signal drop-outs for total reliability. Since there are 16 user-selectable operating frequencies up to four systems can be used simultaneously.