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: Talkback echo cancellation and noise suppression (CVC) technology
8: Support dual USB output voltage, power supply to other devices, output a total of 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
