• Earphone jack φ3.5mm

• The Discussion Main Control Unit DMS4038, handling power 400W, supporting up to 70 delegate and chairman speech units,could be extended to up to 250 units by connecting with extension unit .

• Microphone and earphone jack for Chairman Unit; wired collarworn microphone and portable earphone can be connected.

• Earphone jack and recording output jack for Delegate Unit.

• Built-in clamshell, ultra thin, high fidelity loudspeaker, and the flip angle is adjustable, with feedback eliminator, volume control knob and clear sound.

• Ultra-directional microphone with status indicating ring (red), indicating accurately the position of spokesman and number of speaking. The neck of microphones can be freely adjustable on height and angle according to need.

• Volume potentiometer (VOL) to adjust the volume of the loudspeaker

• Microphone switch (TALK)

• Microphone ,Ultra-directional electret MIC

• (PRIO) priority key of chairman unit (Delegate unit without). By pressing this key Chairman unit can turn off delegate unit.

• Accessory: collarworn microphone, portable earphone