[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 music [Multifunctional]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 [More 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 work [Perfect 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 children Key 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 Standard Charging voltage: DC 5V/1A Operating voltage: 3.7V Power consumption: about 1.5W Battery: Lithium-ion polymer, 3.7V/1200mAh D/C conversion: 16Bit Sampling frequency: 44.1KHZ Frequency response: 20HZ-10KHZ Power output of earphone: 16mW+16mW/16-32Ohm Impedance of earphone: 32Ohm/16mW Supported disc formats: CD, CDR, HDCD, MP3 Shockproof time: CD 60 seconds/MP3 120 seconds or more Colour: black Material: ABS Size: 133 x 133 x 27mm Package Contents: 1 x Portable CD player 1 x 3.5 to 3.5mm AUX cable 2 x headphone 1 x USB cable Warm 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.