Dual CS43198 plus dual SGM8262 build a professional audio architecture, and the portable CD player also has HiFi-grade sound quality! At the same time, the volume is adjusted by CS43198, with 99 levels of delicate volume control, which not only achieves smooth volume adjustment but also makes the sound at each volume level clearer! The three-dimensional dimensions are only about 14413727mm! The body is compact, but the performance is amazing, with a balanced output power of up to 660mW. It can not only drive most earbuds but also connect to active speakers or other more advanced headphone amplifiers for further expansion, bringing you an extraordinary listening experience! The only portable CD player currently in production that supports USB ripping + recording functionality! You can save your favorite CDs in WAV format to a mobile storage device for easy sharing with friends and family. You can also use professional software to easily transfer music to your computer or phone, share across multiple platforms, and play on demand. The only machine with a 4.4 balanced line output among currently produced portable CD players! 3.5mm and 4.4mm headphone output interfaces to connect headphones; 3.5mm + 4.4mm line output interfaces to connect active speakers and amplifiers! Optical and coaxial digital audio outputs to connect external high-end decoders! Once the DM13 is connected to a USB adapter, simply switch the D.MODE switch to the "ON" position, and the DM13 will be powered directly by the USB without consuming battery power, which can also better protect the battery life!