1. 9/VOL+ button: next track/( long press) increase volume2. 4 PPP Key: Power on/off, Play, Pause3. :/VOL- button: previous track/( long press) decrease volume4. Power switch: Power on/off5. Headset port: 2.5 standard headset port● Power on/off1. Power on : slide the ON/OFF switch to ON side, long press 4 the MP3 will turn on.2. Power off: slide the ON/OFF switch to OFF side, or long press 4 the MP3 will turn off● Adjust the track: Short press : button for the previous track, Short press 9 button for the next track.● Adjust the volume: Long press 9 button to decrease the volume, Long press : button to increase the volume.● Playing mode: Loop play is enabled.Instruction on recharge:Use the charger supplied with the MP3 to recharge it, or recharge it through a USB port of the computer.Use it as a USB stickThe MP3 has standard USB stick function. The OS supported are Windows 98( you need to in stall the driver), Windows 2000 or later version( no need to install the driver), Mac OS 10.3 or later version, Linux Redhat 8.0 or later version.(Notes: the indicator is on when it is connected to the computer, and the indicator will blink with quick rate when deleting or copying files but with slow rate when no action)Low battery voltageThe MP3 will power off automatically when battery voltage runs too low.TroubleshootingThe MP3 can not Power onIs the battery voltage too low?The headset gives no voiceMake sure the headset volume is not set to minimum and the connection is done properly.Make sure the headset is clean.Corrupted MP3 files may make noise or cannot be played, make sure the file is valid.Music can not be downloaded to the MP3Check and make sure the USB cable is not damaged and the connection is proper.Make sure the driver is installed properly. 兼容WAV,WMA ASF具有U盤功能,WindowsME/2000/XP/Vista以上無需安裝驅動7種音色均衡器:自然、搖滾、流行、古典、柔和、爵士、重低音USB2.0接口,即插即拔長時間高質量的數碼錄音功能單曲循環,全部循環,重複播放,A-B循環由內置可充電鋰電池供電技術規格:*精巧外型设计,LCD屏*尺寸：(41mm 28mm 7mm)*可选颜色*支持多种音频格式如MP1、MP2、MP3、WMA、等音乐格式。*精巧外型设计经典的外观设计，合适的手感*内存容量256M/512M/1G/2G可选*免驱动U盘功能无需管理程序.*在WIN98以上系统中无需安装驱动程序。*高速usb2.0传输速度.支持系统个性化配置文件*内置可充电锂电池可播放3-4小时配件:耳機USB線