The QLXD2/B58 emits pristine uninterrupted sound across its entire 100 meter range. The interchangeable capsule gives you outstanding flexibility allowing you to customise your mic to suit any situation with Shures range of famous sound signatures. One-press IR sync establishes an interference free connection with the receiver whilst the backlit display screen lets you see whats important. Select between channel/group frequency or battery runtime. Eliminate guesswork and perform with confidence.