Shure QLXD2/SM58-V50 Digital Handheld Wireless Microphone Transmitter with SM58 Capsule (V50: 174 to 216 MHz)The Shure QLXD2 SM58 is a digital handheld wireless microphone transmitter compatible with QLX D and ULX D receivers. It comes equipped with the legendary SM58 dynamic capsule, an industry standard for vocal performers and presenters. The capsule features a cardioid polar pattern that minimizes background noise and feedback, and its brightened midrange and bass roll off gives you that sought after warm and clear vocal reproduction. The QLXD2 SM58