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Reviews around usb port (5.00 of 5)
FM Transmitter, Nulaxy 1.8" Color Screen Bluetooth FM Transmitter Wireless in-Car Radio Adapter w/Car Battery Voltage Reading, Handsfree Calling, USB Drive, TF Card, AUX, EQ Mode - KM34, Black
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easy to install, has clear sound, it has a usb port to charge your phone while fm transmitter is in charger port.displays caller info on transmitter
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The built USB port for charging it nice.
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I also like the dual USB ports for charging my phone and other things while still using my BT transmitter.
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