... the operation more convenient and faster.Navigation and auditory function: in the absence of navigation voice prompts, they can normally enjoy ... ID, call history information, with a dial pad.Built-in Amplifier: Built-in 4-channel amplifier, 4 × 45W.Touch screen: graphics ... -machine dialogue and friendly.SD / USB/ TF Interface: You can insert MP3, MP4, WMA, AV1, JPEG and other formats media files ...