Featuring pristine 24-bit digital audio and remarkably efficient RF spectrum usage, the QLXD24/B58 will give you clear, uninterrupted, worry-free performance. Incredibly easy to set up, the QLXD24/B58 Wireless system's receiver finds open frequencies and deploys them to its transmitter with the push of a button. Featuring an interchangeable Beta 58A supercardioid microphone capsule, the Shure QLXD24/B58 handheld Wireless microphone system will set you free!