microphone,wireless microphone,karaoke microphone,dual channel wireless microphone Model:JA-U588 Frequency Range;614-806MHZ microphone,wireless microphone,karaoke microphone,dual channel wireless microphoneModel:JA-U588Frequency Range:614-806MHZ Maximum Deviation:<75KHZ Integrated ... in good position Working Temperature:-10 degree to 50 degree dual channel wireless microphone JA-U588