[. . . ] Note: Player continues to use battery power after it's been turned off, if unit isn't used for a while, the battery might need to be charged. Charging the Battery You can charge the Player's battery in two ways: Connect player to your computer. [. . . ] (available separately) Note: For maintain the rechargeable battery performance, please disconnect the player with the computer or power charger when it is done. C. Connecting and Disconnecting Player You can connect the player to your computer to upload / download those music files, and charging the battery, disconnect them when you're done. To Connecting Player: 1. Plug the 2. 5mm jack plug of USB cable to the Player multi-function earphone jack, then plug the other side USB plug into a USB port on your computer, then the computer will detecting and installing driver automatically. And removable disk drive(s) will display in "My computer" folder (for Windows 2000 / XP system or above). An "Untitled" icon will display on desktop indicating the player is removable disk(s). Now the player is ready for music files upload / download with your computer. You can transfer the music files by using the computer mouse and drag and place, or copy and paste, in between the player and computer. To Disconnecting Player: It's important not to disconnect player while it's syncing. Don't disconnect, if you have uploading or downloading music files with your computer. Press and hold "VOL / S" button for 2 ­ 3 seconds again to return to "Normal" play mode and the LED light flashing will turn back to normal as music playing mode for about once per seconds. F. To Reset Player In some circumstances the device may hanging and need to reset. This player has design with built-in a mini tact switch which located at the behind of the earphone jack, so it can provide the reset function to restart the device pass through the earphone jack hole. Use a wooden stick (less than 2mm dia. ) or similar object, such as tooth stick and cut out the sharp side, and carefully insert the stick, use dull side, into the earphone jack hole until you feel to hit the end. Then add a bit of force and you will get a click sound and feeling return from switch. The device is reset, all settings are back to factory default and the device will go into music playing mode automatically. Important: Do not reset the device if it is proper working. G. Troubleshooting: Check whether battery have enough energy. Check whether Volume is set to "minimum" and connect the headphone plugs firmly. [. . . ] Check whether Volume is set to "minimum" and connect the headphone plugs firmly. Check whether music files format are support. Play cannot turn ON No sound is heard Download of music files fails. Check whether player's USB connector is connected with computer properly. [. . . ]