Feature:
1.Bluetooth version 5.0, support Bluetooth call, Bluetooth music transmission, caller number
2.Support TF Card / U disc player and card reader function, support MP3/WMA format music ( U disk and TF card are not included) 
3.Double USB charging port 2.1A can expand the portable device function, suitable for all mobile phone, tablet and other electronic products charge
4.1.3 inch LED dot matrix screen, display frequency point, file name, and working state information
5.Support one key menu setting language, playback mode, and stereo mode
6.Support power failure memory and folder playback
7.AUX  output function, Support voltage display
8.One button switch, pause, listen / Hang / listen / down key
9.FM frequency range 87.5-108.0MHZ
10.Supported Multi-languages: Chinese, English, French, Spanish, German, Portuguese, Italian, Dutch, Swedish, Russian

Specification:
Type: Bluetooth Car FM Transmitter
Bluetooth version: 5.1+EDR
FM transmission frequency: 87.5-108.0MHZ 
LED display size: 1.3 inch
TF & U disk: TF card supports up to 64GB, U disk supports up to 128GB ( U disk and TF card are not included) 
Rated operating voltage: 12V-24V
FM Transmitter Mode: Stereo Digital PLL Lock
USB output: 5V / 2.1A 5V / 1.0A
Bluetooth sound processing: A2DP
Support Music format: MP3/WMA 
Operating temperature: 0-40 degrees
Distortion degree: <0.1%
Signal to noise ratio: >60dB
Bluetooth microphone effective distance: 0.5-2M
Bluetooth transmission distance: 10M 
USB output: Dual USB output
Frequency response: 20Hz-15Khz
Left and right channel separation: > 60db
Size:12*10*3.3cm/4.72*3.94*1.30in

Package included:
1 x Car Bluetooth MP3( U disk and TF card are not included)
1 x Audio cable
1 x User manual

Operation guide:
1.Plug the FM transmitter into the car cigarette lighter socket to supply power. Please find this device.
2.Find an empty station and keep the FM transmitter and the car FM radio at the same frequency.