USAMS Bluetooth 5.0 FM Transmitter Fast Car Charger with Digital Display Handsfree MP3 Player Support BT/USB flash disk/TF Card


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Expertly charge your devices on the go with the USAMS Bluetooth 5.0 FM Transmitter. Its fast charging capabilities and digital display make it perfect for quick trips. Plus, with handsfree calling and support for multiple devices, you can stay connected and entertained while on the road.

C21 Dual USB 3.4A Digital Display Wireless FM Car Charger


1. Specifications:

Weight: About 34g

Size: 78*51.5*45mm

Input: DC 12V-24V

USB A Port Output: 5V-2.4A

USB B Port (With Music Symbol) Output: 5V-1A

Total Output: 3.4A(Max)

Power: 15W(Max)

Compatible USB Disk Capacity: ≤64G

Compatible TF Card Capacity: ≤64G

Support Audio File Format: MP3

FM Frequency Range: 87.5-108MHZ

BT Version: 5.0

Connection Distance: ≤5m

Compatibility: For mobile phone/tablet


2. Features:

1.Connect car audio, wireless listening while driving.

1.Support BT/USB flash disk/TF card play mode.

2.Hands-free call, large volume navigation broadcast.

3.Dual outputs, charge two devices at the same time.





3. FM and Connection

①Plug the product into the cigarette lighter port and power on, the LED screen displays car battery voltage, that means the start up is successful

②Long press multi-function knob, the numbers on LED screen flashes, and enter FM mode, then adjust the car audio to a blank frequency (radio channels not available in the local area)

③ Rotate the multi-function knob to adjust the FM of product to make it consistent with the car audio

④Turn on phone BT, search “US-CC115” and click to connect.

Note: After start up, LED will display the car battery voltage; after car audio is connected, LED will display frequency by default.


4. Playing Music

The product supports 3 play modes: BT mode, USB flash disk (≤64G) mode, TF card (≤64G) mode, and the default play priority is BT mode, USB flash disk mode,TF card mode.


Power-off memory function (USB disk/TF card) : If power-off, the product will automatically remember the song and volume at the time of power-off, and automatically start playing from the song after restart up.


Play/pause: short press multi-function knob once

Volume adjustment: rotate the multi-function knob clockwise/counterclockwise

Prev/Next Song: Short press the prev/next song button once


5. Phone calls

Answer/hang up: Short press multi-function knob once

Reject : Long press multi-function knob for 2s

Last number redial: Short press multi-function knob twice



Both USB output ports can charge for digital devices such as phone/tablet.

*When using 2.4A USB port, it is recommended to use with data cable with 2A or above current.

Additional information

Weight N/A