[1200mAh Rechargeable Battery] This portable personal CD player comes with a 1200mAh lithium-ion battery. No need for AA batteries or to keep the charger plugged in. Use the included USB cable for charging, fully charged in about 4 hours. Portable and convenient to take with you wherever you go to enjoy music. [Multifunctional] This CD player boasts modern features. DIR: All files can be played repeatedly for mp3; 4 Playback Modes: Repeat one song, Repeat ALL, DIR, INTRO, SHUF. [More Compatibility] Broad compatibility with CD, MP3 CD, CD-R, HDCD formats, AUX connected to all audio devices with 3.5mm audio input, such as connecting the speaker or headphones 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 is incompatible, it will not work. [Perfect as a Gift] Small and stylish music CD player with a classic black finish and a perfect LCD display. It's ideal for music enthusiasts, language learners, and expectant mothers, and makes a heartwarming gift for friends, family, and children. Key Lock: After setting the playback mode and volume, switch the power switch to the HOLD position to prevent accidental changes to the player's settings. Specification: Power Supply: DC 5V/1A, -USB2.0 Standard Charging Voltage: DC 5V/1A Operating Voltage: 3.7V Power Consumption: about 1.5W Battery: Lithium-polymer, 3.7V/1200mAh D/C Conversion: 16Bit Sampling Frequency: 44.1KHZ Frequency Response: 20HZ-10KHZ Headphone Output Power: 16mW+16mW/16-32Ohm Headphone Impedance: 32Ohm/16mW Supported Disc Formats: CD, CDR, HDCD, MP3 Shockproof Time: CD 60 seconds/MP3 120 seconds or more Color: black Material: ABS Size: 133 x 133 x 27mm Package Contents: 1 x Portable CD Player 1 x 3.5 to 3.5 mm AUX Cable 2 x Headphones 1 x USB Cable Warm Tips: 1. Please turn off \"HOLD\" key when using it. 2. Never touch 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 cannot read discs correctly, 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, make sure that the power source and charging voltage are DC 5V/1A. Excessive voltage input may cause machine overload damage.