Nextar MA797-4B MA797 with FM function-User Manual - Page 30

20. Notice  Make sure all keys are enabled before operation. If they are locked, hold down the MENU and VOL- button to unlock them.  Please charge the battery immediately when the display indicates low battery, or the device will be powered off automatically.  Please disconnect the player from PC properly to avoid data loss.  The transfer rate displayed on the PC may be different depending on the operating system. Exact transfer rate should be subject to the player's indication. 21. Listening Cautions  Do not play your earphones or headphones at a high volume. Hearing experts advise against continuous extended play.  If you experience a ringing in your ears, reduce volume or discontinue use.  Do not use while operating a motorized vehicle. It may create a traffic hazard and is illegal in many areas.  You should use extreme caution or temporarily discontinue use in potentially hazardous situations.  Even if your headphones or earphones are the open-air type designed to let you hear outside sounds, don't turn up the volume so high that you can't hear what's around you. 29