Retevis H-777 / RT-5R / RT-5RV / RT-B6 Two-way Radio Devices. Retevis H-777. Retevis RT-5R. Retevis RT-5RV. Retevis RT-B6. Sensitivity:-40dB±3dB at 1000Hz (0dB=1V/Pa). It has a remote microphone with push to talk button you can clip almost anywhere.
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