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Product Name: 3.5mm Smartphone to RJ9 Handset Plug Adapter
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Function: Convert 3.5mm smartphone plug to single RJ9 handset plug.
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Cost-Effective: Save money by using a smartphone headset or your existing one with your phone's handset jack.
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Binaural Sound: Adapter outputs binaural sound for stereo headsets, allowing sound to be heard in both ears.
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Compatibility: Use your favorite smartphone headset with Aastra office phones.
