Shure Digital Handheld Transmitter With SM58 CapsuleThe Shure ULXD2 SM58 is a digital handheld wireless microphone transmitter compatible with ULX D and QLX 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. ULXD2 SM58= X52