The Nady DW-22 Dual Transmitter Digital Wireless Microphone System brings you the superior sound quality of digital audio technology in a simple, easy-to-use and reliable package. With the two included Digital HT handheld microphones, this system couldn\'t be easier to set up and operate. After inserting new AA batteries in the transmitters, just connect the AC adapter as well as the audio output that is most suited to your set up (either microphone or line level) to the receiver and turn them both on. The system is now ready to go!