Sony UWP-D12 Integrated Digital Wireless Handheld Microphone ENG System features all-metal construction, easy to read LCD displays, a wide switching RF bandwidth, USB power and charging, automatic channel scanning, infrared synchronization between the transmitter and receiver, a true diversity receiver, a headphone output on the receiver, output gain control on the receiver for optimizing input level to a camera, and digital companding circuitry to improve the transient response of received audio. The package is suitable for a wide range of wireless applications such as ENG, talk shows, lectures, and more.The system is referred to as integrated digital because the transmitter and receiver utilize DSP for digital companding and expanding of the transmission signal. Performing the companding and expanding processes in the digital domain improves the accuracy and transient response of the received audio.