... the navigation state, can be carried out in the touch screen handwriting input, the operation more convenient and faster.Navigation and ... -in Amplifier: Built-in 4-channel amplifier, 4 × 45W.Touch screen: graphics interface operation, reduce the visual buttons to increase the ... change.Wallpaper make changes by itself.Direct songs touch, off-screen playback.Certificate: Rohs, CE, FCC and so on., all ...