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Multimedia speakerDescription It is multimedia speaker comes with USB audio DSP processor, which will automatically be recognised by a computer. Convenient 3.5mm audio interface can also connect to MP3 Players, iPods, iPhones, iPads, mobile phones easily. Built-in rechargeable lithium battery allows you continue to enjoy wonderful music without unnecessary wires. Use with a computer(USB Powered): 1.Connect the speaker to a computer using the USB cable included, the indicator light will turn into red or orange. If the indicator turns red, please press the switch on the bottom. 2.Use the Windows media player or any AV Player of the computer to playback media files, then the sound will come from the mini speaker. 3.Either use the computer system volume control slider to adjust the volume, or you can also directly control the volume within the media player. Use with other media device (Battery Powered) Plug the mini USB end of the cable into the speaker, plug the 3.5mm audio plug into a media player's headphone socket. When the indicator is green, it is ready to go. If not, press the button at the bottom. Tips: if nothing happens after trying, then it indicates that internal battery is low and needs to be recharged. For this reason, please switch off the speaker when not needed to prevent battery from discharging. Recharging 1 via a computer's USB port 2 via a compatible DC mains charger Tips: Red light indicates unit is charging while not in use; Orange light indicates charging while unit is in use, while charging while playback; Blue light indicates that charging has been completed or in offline status (not connected to a computer USB port). Music Source: * 3.5mm audio LINE-IN Simply connect your mp3 player, iPods, mobile phones via standard 3.5mm headphone socket. * USB Audio DSP (Digital signal processing) TechnologySimply connect the USB cable to a PC, the computer will install driver software automatically. No 3.5mm line-in cable required, because there is a built-in digital sound card inside the speaker. Compatibility: Any device with 3.5mm audio-out headphone socket Computer OS: Windows (XP, Vista, 7), Mac OS X (10.4 or higher) USB or DC 5V power supply Included: ONE Mini Speaker in Black USB Standard A with 3.5mm audio Line-in to 5 pin Mini USB cable SPECIFICATIONS ItemMultimedia speakerModel NumberYX002Special FeaturePortable, MiniSpeaker4ohm, diameter:40mmLine Input3.5 stereo audio earphoneWorking Timeabout 10 Hours (medium volume, random music)Li Battery Capacity200mAHBattery Voltage3.7VBattery Charging Voltage4.2 5VFrequency Response130Hz 22KHzS/N Ratio≥90dbUSB power cordoptionalBattery Charging TimeAbout 3 HoursRating Power2WPower Supply InputMINI USB (5V/500mA)Weight0.060kgDimensions54.0*17.0 mmUseHome Theatre, Portable Audio Player, Mobil, laptopColorOptional