QA661 Userās Guide Quloos- 11 -l White4.8 Main Colorl Redl Pinkl Greenl Bluel Yellowl White4.9 Progress Barl Line 01l Line 02l Point 01l Point 02l Box4.10 Screen BrightnessThe brightness can be set as three levels - 100, 200 and 300.4.11 Automatic Off-screenThe Automatic off-screen time options are "No, 10s, 20s, and 30s".It will improve sound quality to turn off the screen. Meanwhile, press FO key on the remotecontrol to turn off the screen, press again to restart.4.12 Key Reaction SpeedThe key reaction speed mainly refers to the processing speed of long press, such as the speed ofmoving the cursor upwards and downwards, FF/FB, etc.Options are 10~100.4.13 Signal Optionsl Internal: Select to play the songs on the SD card.l Coaxial: Select to receive the external signals from coaxial interface.l USB: Select to receive the external signals from USB interface.4.14 LanguageThe GBK encoding font library is adopted supportive of 20,000 national words with threelanguages - Simplified Chinese, traditional Chinese and English.