[1200mAh Rechargeable Battery] The portable personal CD player comes with a 1200mAh lithium battery. No need to use AA batteries or keep the charger plugged in constantly. Use the included USB cable to charge; a full charge takes approximately 4 hours. Portable and convenient for carrying anywhere to enjoy music. [Multifunctional] The CD player features playback functions. DIR: All files can be played back repeatedly in MP3 mode. 4 Play Modes: Repeat One, Repeat All, Directory Repeat, Intro, and Shuffle. [Wide Compatibility] Supports CD, MP3 CD, CD-R, and HDCD formats. Includes AUX input with 3.5mm o jack for connecting to compatible o devices such as speakers, headphones, or car o systems, offering more ways to enjoy your favorite music. NOTE: Ensure your disc is spinning. Incompatible disc formats will not play. [Ideal Gift Choice] Compact and lightweight CD player in classic black with a sleek design and clear LCD display. A great choice for music lovers, language learners, and expectant mothers, and a thoughtful gift for friends, family, and children. Key Lock: After setting playback mode and sound effects, slide the power switch to the HOLD position to prevent accidental changes caused by external interference, such as from children or crowded environments. Specifications: Power source: DC 5V/1A, Micro-USB 2.0 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 Headphone output power: 16mW + 16mW / 16–32Ohm Headphone impedance: 32Ohm / 16mW Supported disc formats: CD, CDR, HDCD, MP3 Shockproof time: 60 seconds for CD / 120 seconds or more for MP3 Color: Black Material: ABS Dimensions: 133 x 133 x 27mm Package Contents: 1 x Portable CD Player 1 x 3.5mm to 3.5mm AUX Cable 2 x Headphones 1 x USB Cable Warm Tips: 1. Make sure to turn off the "HOLD" function before use. 2. Do not touch the lens. Always keep the disc compartment closed to prevent dust accumulation. 3. The player only supports CD, CDR, MP3, and HDCD formats. 4. If the device fails to read discs, use a standard commercially available optical cleaner. Avoid other cleaning methods that may damage the lens. 5. Clean the unit with a clean, damp cloth. Do not use chemical cleaners. 6. When charging, ensure the power source provides DC 5V/1A. Excessive voltage may damage the device.