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A discussion device with a two-channel selector enables participants to speak, register requests to speak and listen to others. It provides a socket for connecting pluggable microphones. Two channel selectors are built into the device, and corresponding headphone interface and independent volume control are installed on both sides of the device, making a device available for two representatives. Because of the channel selector, the device is suitable for meetings in many languages and for simultaneous interpretation. Each channel selector consists of an up and down channel selection key and a display that displays the number and indentation of the channel name, allowing for rapid selection of the desired language channel. Basic function, reduce the headphone output level to prevent to produce acoustic feedback (when listen to the basic language and is activated when the receiver opened when the device is used in double representative mode, can provide this functionality alone, through the microphone button to change into two separate microphone button (for a separate receiver control and separate identity), the device can be converted to full dual-use device (DCN - DISBDD dual-use button requires a separate order and purchasing), a built-in speakers will mute when the receiver opened, In case the length and width of the acoustic feedback, the device can use two microphone (DCN - MICS and DCNMICL, require separate order), the user can choose a variety of color decoration article (DCN - DISR, requires a separate order and purchasing), in order to match the room style, the device can be used as a single representative device, on behalf of the device, chairman device (DCN - chairman DISBCM button requires a separate order) or a single representative with auxiliary button device, for instance, Multi-purpose auxiliary button can be used to call for service staff, available cable clip (DCN - DISCLM, requires a separate order) to lock loop cable, apparatus for light color and brunet two base control and indicator light, two alphanumeric display, serial number and channel name abbreviations used to select the language channel, microphone button with a red, green or yellow hair. Red said receiver in the activated state, "green says it has to accept a request, and yellow says" VIP "(when the device is used in double representative mode, can provide this functionality alone), when representatives to join a notebook, VIP indicator light will light up (only when using the PC software available), two separate headphone volume control button, hidden" De - init "switch interconnect components, used for pluggable microphone socket, two 3.5 mm (0.14 inch) stereo headphone jack, 2 meters (78.7 inches) cable, Six-pin circular connector with moulded end