features cordless design, which is convenient to carry and will not restrict your movement, so that you are free from the interference of cluttered lines.It is perfect for stage performance, karaoke, public address (presentations, classes, conferences). Features: Wide frequency response, high S/Nratio. Resist disturbing strongly, limit noise output. High precision quartz crystal locked frequency technology. No hitting when putting in the switch, so can protect theamplifier and speakers. With a complete working state and power level indication. Two microphone works at the same time without anydisturbing caused by. Two microphones are controlled independently and easy to operate. With a wide using range for over 100m for compandor type or 50m for non-compandor type in a nice surrounding, for 40-60m for compandor type or 20-30m for non-compandor type in a duplicate one.