Features: 600-690MHz UHF wireless handheld microphone receiver system for karaoke, party, DJ, business meetings, speech or other outdoor indoor activities. High-quality sound transmission, clear voice and low noise, without feedback and free from distortion, suitable for live performance. 48 selected channels, supports using 16 sets at the same time; and the effective transmission range is about 30M in open area. The receiver with 6.35mm(1/4) connector, you can connect it to your speakers or amplifiers easily. Plug and play, easy to use, wireless battery-powered microphone receiver allow you to move freely on stage or in the room.