HD DIVERSITY: true diversity reception mode , RF A and RF B the signal strength of a display, to achieve the best radio reception; corresponding to the RF A and RF B indicator LED will flash alternately; single received signal; single received signal; AY IN: External input AV signal; HDMI IN: External HDMI signal input , the best support 1080P; USB: Online software upgrades, AV, pictures, file preview and play(this function a little longer} In the choice of menu, this button is used down; POWER(6): Press 3S
