Portable Karaoke Microphone Mixer System Set with Dual UHF Wireless Mic, 3.5mm AUX/Optical/Coaxial in Singing Receiver for KTV, Amplifier, Speaker, PA System, Karaoke Machine, DJAbout This Item: Model NO.: K202 Brand voijump Item dimensions L x W x H 6. 65 x 4. 76 x 2. 2 inches Connectivity Technology AUX Color Dark Black Compatible Devices Television, PA System, Amplifier, Karaoke Machine, Speaker TWO IN ONE: The wireless microphone receiver is also a sound mixer which is equipped with rotatory adjustment controls which allow you to easily adjust echo, tone, volume of the mics and music to the desired level. INTERFERENCE