[1200mAh Rechargeable Battery]: The portable personal CD player comes with a 1200mh lithium battery. No more needing to use AA batteries or always have the charger plugged into the CD player. You can charge it with the included USB cable in about 4 hours. Portable, convenient for you to take your music anywhere and anytime [Multifunctional] CD player with all kinds of modern features. DIR: All files can play mp3 repeatedly; 4 play modes: repeat track, repeat all, DIR, INTRO, SHUF. [More Compatibility]: Widely compatible with CD, MP3 CD, CD-R, HDCD formats, AUX to connect all sound devices 3.5mm audio input, such as connecting speakers or headphones or car, this CD player provides you with more options to enjoy your favorite music. Note: Please check that your disc is spinning. It will not work if your disc is in an incompatible format. [Perfect as a gift]: Small and lightweight music CD player, classic black color, smooth appearance and perfect LCD display. The best choice for music lovers, language learners and expectant mothers, it is the warmest gift for friends, family and children. Key lock: After setting the playback mode and sound effects, you can turn the power switch to the HOLD position to Prevent environments, such as naughty children or crowded places, from affecting the player's settings. Specifications: Power supply: DC 5V/1A, Micro-USB2.0 Standard charging voltage: DC 5V/1A Operating voltage: 3.7V Power consumption: about 1.5WB Battery: Li-Ion Polymer, 3.7V/1200mAhD/C Conversion: 16Bit Sampling Frequency: 44.1KHZ Frequency Response: 20HZ-10KHZ Headphone Power Output: 16mW+16mW/16-32Ohm Headphone Impedance: 32Ohm/16mW Supported disc formats: CD, CDR, HDCD 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 Headphones 1 x USB Cable Reminder: 1. Please turn off the "HOLD" key before use. 2. Never touch the lens of the device. Always keep the disc compartment closed to prevent dust from collecting on the lens. 3. This player is only compatible with CD, CDR, MP3, HDCD formats. 4. If the device cannot scan the disc correctly, clean the optics with a standard commercially available cleaner. Other cleaning methods may damage optics. 5. Clean the device with a clean damp leather cloth. Do not use any cleaning agents. 6. When charging, make sure the power supply and charging voltage are DC 5V/1A. Excessive voltage input may cause overload damage to the machine.