There are a total of 5 sound ranges carries on as adjusted if the unit is switched on and off; To boost sound stage: Tap and keep “Fn” essential and tap ”Ideal” arrow critical; To lower sound level: Tap and maintain “Fn” important and tap ”Remaining” arrow key. The MX https://linkingbookmark.com/story14811894/an-unbiased-view-of-wireless-bluetooth-virtual-keyboard