- 34 -The brightness of background light : three different display brightness adjustment, you canuse the remote control to select the appropriate brightness, and the third is the brightest.The background light time: there are 4 modes available setting the display lighttime,including:5 seconds,10 seconds,30 seconds and always keeping brightness.3.4.6 Firmware Upgrade1.Network upgrade: when the network connection is OK, the backstage has the latest firmware,the system will pop up a dialog which shows if you need to upgrade the program,If you pressthe button of confirmation, the system will automatically download the new firmware and