[1200mAh Rechargeable ]The portable personal CD player comes with a 1200mh lithium . Don't need to use AA batteries or always plug the charger into the CD player any more. 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 music[ functional]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, SHUF[ Compatibility]Widely compatible with CD, MP3 CD, CD-R, H D 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. : Please check whether your disc is rotating or not. If your disc format isn't compatible, it won't work[ Choice as a ]Small and handy music CD player with classic black color, smooth appearance with LCD display. It is the best choice for music enthusiasts, language learners and expectant m s, and the warmest gift for friends, family and childrenKey lock: playback mode and sound effects have been setup, you can toggle the power s to the HOLD position in order to prevent the environment, for example naughty children or crowded occasions from affecting the setting of player. : source: 5V/1A, Micro-USB2.0 Charging voltage: 5V/1AOperating voltage: 3.7V consumption: about 1.5W : -ion pol , 3.7V/1200mAhD/C conversion: 16BitSampling frequency: 44.1KHZFrequency response: 20HZ-10KHZ output of earphone: 16mW+16mW/16-32OhmImpedance of earphone: 32Ohm/16mW ed disc formats: CD, CDR, H D, MP3 proof time: CD 60 seconds/MP3 120 seconds or more ur: 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 the lens of the device. keep the disc compartment closed to prevent dust from collecting on the lens.3. The player is only compatible with CD, CDR, MP3, H D formats.4. If the device is unable to scan discs properly, use a standard commercially available cleaner to clean the optics. cleaning methods may damage the optics.5. Clean the device with a clean, damp leather cloth. any cleaning ts.6. charging, ensure that the source and the Charging voltage are 5V/1A. Excessive voltage input may cause machine overload damage.