Operating Range: 80 Feet. UHF wireless microphone is less likely to subject to interference than VHF microphone. Reliable signal and no worried about the sound will be cut in and out during use.3 vocalists can sing karaoke together. 1/4 inch input for extra wireless microphone (not included but could be found from Fifine). Separate volume control for each wireless mic. Perfect for karaoke, party, school and church.Adjustable echo effect. Allowed to mix the mic signal with music signal without using an mixer. Compact metal receiver, has stronger anti-interference ability than plastic ones. This wireless microphone system can save space at home and be portable for on the go use.Verified cables allowed flexibility for connections. 1x1/4 inch audio cable (L:39inch), 1x3.5mm audio cable (L:59 inch), 1x3.5mm to RCA audio cable (L:59inch). It could be a karaoke microphone or speaking microphone to meet different purpose.ATTENTION: This package only contains the wireless microphone system. You still need to have an audio device (speaker or amplifier) to output the sound.