The Nady DW-22 Digital Wireless Microphone System brings you the superior sound quality of digital audio technology in a simple, easy-to-use and reliable package. Available in a variety of combinations (with 3 types of transmitters to choose from: Digital HT™ handheld microphone, Digital LT™ LM-14/O lapel microphone or Digital LT™ HM-3 headset), 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(s) most suited to your set up (either microphone or line level) to the receiver and turn them both on.