1 cable to quick disconnect, 2 pivot pin, 3 headset receiver, inside view – Plantronics DuoPro User Manual
Page 12: 4 replaceable ear cushion, 5 adjustable headband for over-the-head headsets, 6 cable stabilizer notch, 10 stabilizer bars, 11 voice tube boom, 12 noise-canceling microphone boom, Duopro
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