The Audio-Technica Microphones - ATW-1102 System 10 Dynamic Wireless System is an digital wireless receiver and microphone transmitter. Operating completely free of TV interference in the 2.4 GHz range, this system is plug & play easy to use. Automatic frequency selection ensures maximum reliability by jumping between two broadcasts without interruption. XLR balanced and 6.3mm unbalanced fits most every live sound situation. At this price, the ATW-1102 is great for school presentations or small clubs.