Retevis H-777, RT-5R, RT-5RV, RT-B6. Retevis H-777, RT-5R, RT-5RV, RT-B6. HQRP® Two Hands Free Headsets with Earpiece and Push-to-talk Microphone ;. HQRP trademarked products. Cable length: from the connector to the PTT 72cm / 28.3"; from PTT to earhook 23cm / 9";.
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