As the least expensive in ear monitor system offering both Shure's renowned quality and innovative new features, the PSM 200 makes the benefits of in ear monitoring accessible to a wide array of cost-conscious musicians, houses of worship, and installations requiring assistive listening devices. Beyond cost, the PSM 200 components deliver exciting new features including the built-in ability to upgrade the receiver from wired to wireless (as is the case with this system), a transmitter that is also a mixer, and a high fidelity earphone.