Numeral and color LED display 1,LCD display incoming caller ID and Name 2,Full Duplex/Noise&Echo Suppression/DSP Technology 3, ... &Microphone/FM Transmitter/Wireless Earphone piece 4,Supports U-disk and SD/MMC Card to play MP35,TTS system announce incoming ... -in rechargeable lithium battery8.Can be connected with parking sensors and camera9. 2,3,4sensors for option10.Step-up buzzer alarm11 ...