V-TEC DJ-401 Audio headset
Audio headset working with DT433, DT17S, DT471, DT472. They can be combined as a video intercom with a headset. There is an additional frame that can combine the handset with monitors (DJ401 + DT471 or DJ401 + DT471). It cannot work as a standalone intercom handset.
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An independent gadget for privacy conversation;
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2-Wire monitor as a peripheral handset.