Features:
1. Support FM full frequency point transmission function 87.5-108.0MHZ
2. Support dot matrix display 1.4 inches
3. Support U disk function
4 support TF card function
5: Bluetooth answer, hang up, reject, redial the phone and other functions
6: support Bluetooth stereo music player
7: Cancel echo and noise suppression (CVC) technology during a call
8: Supports dual USB output voltage, powers other devices, and the maximum output is 5V/3.1A
9: Automatic power-off memory function
10: support for charging identification
11: support for private answer
12: Support power hard switch
13: large knob multi-function keys
14. Support MP3 / WAV format music player
15. Supports battery voltage detection

Technical Parameters
Rated working voltage
12V-24V
Limit working voltage
8-27V
USB output
Dual USB output maximum 5V / 3.1A
Operating temperature
0-60 degrees
Charge recognition
USB2 supports 5V / 2.1A
Voltage detection accuracy
+ _1V
Signal to noise ratio
> 60dB
Distortion
<0.1%
Frequency response
20Hz-15Khz
Left and right channel separation
> 60dB
Bluetooth version

Version4.2+EDR
Bluetooth sound processing
A2DP (Advance Audio Distribution Profile) function
Bluetooth transmission distance
Less than 10M
Bluetooth microphone effective distance
0.5-2M
FM transmission frequency
87.5-108.0MHZ
Launch FM mode
Stereo digital PLL frequency lock