1200mAh Rechargeable Battery: The portable personal CD player comes with a 1200mh lithium battery. Don't need to use AA batteries or always plug the charger into the CD player any more. You can use the included USB cable to charge for it, full charge at about 4 hours. Portable and convenient for you to carry it anywhere you want to enjoying musicMultifunctional: The CD player has various modern features. DIR: All the files can be played back repeatedly for mp3; 4 Play Modes: Repeat a track, Repeat ALL, DIR, INTRO, SHUFMore Compatibility: Widely compatible with CD, MP3 CD, CD-R, HDCD formats, AUX connected with all audible devices 3.5mm audio input, like connecting the speaker or headsets or car, this CD player gives you more choices to enjoy your favorite Music. NOTE: Please check whether your disc is rotating or not. If your disc format isn't compatible, it won't workPerfect Choice as a Gift: Small and handy music CD player with classic black color, smooth appearance with perfect LCD display. It is the best choice for music enthusiasts, language learners and expectant mothers, and the warmest gift for friends, family and childrenKey lock: After playback mode and sound effects have been setup, you can toggle the power switch to the HOLD position in order to prevent the environment, for example naughty children or crowded occasions from affecting the setting of player.Specification:Power source: DC 5V/1A, Micro-USB2.0 StandardCharging voltage: DC 5V/1AOperating voltage: 3.7VPower consumption: about 1.5WBattery: Lithium-ion polymer, 3.7V/1200mAhD/C conversion: 16BitSampling frequency: 44.1KHZFrequency response: 20HZ-10KHZPower output of earphone: 16mW+16mW/16-32OhmImpedance of earphone: 32Ohm/16mWSupported disc formats: CD, CDR, HDCD, MP3Shockproof time: CD 60 seconds/MP3 120 seconds or moreColour: blackMaterial: ABSSize: 133 x 133 x 27mmPackage Contents:1 x Portable CD player1 x 3.5 to 3.5mm AUX cable2 x headphone1 x USB cableWarm Tips:1. Please turn off the "HOLD" key before using it.2. Never Contact the lens of the device. Always keep the disc compartment closed to prevent dust from collecting on the lens.3. The player is only compatible with CD, CDR, MP3, HDCD formats.4. If the device is unable to scan discs properly, use a standard commercially available cleaner to clean the optics. Other cleaning methods may damage the optics.5. Clean the device with a clean, damp leather cloth. Do not use any cleaning agents.6. When charging, ensure that the Power source and the Charging voltage are DC 5V/1A. Excessive voltage input may cause machine overload damage.