For Motorola SL1M, SL1K, SL1600, SL300, SL7500, SL7550, SL400, SL4000, SL4000e, SL4010, SL7000e, SL7550, SL8550e, XIRP3688, SL16000, etc. 1 X Air Acoustic Tube PPT Earpiece. Air conduit earphone acoustic signal receiver converts sound waves transmitted through the plastic air duct to the ear.
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