1. Stylish foldable design, delicate, and easy to carry. 2. 2-inch full-frequency alloyed vibrational membrane design, which delivers wider frequency and clearer sound. 3. The hidden sound source tray makes it easier to connect with other MP3s or MP4s. 4. Power-saving design with the high-efficient power amplifier. 5. Embedded with a 20dB tap for loudness Circuit. which protects your hearing and ensure product safety. 6. 3“AAA ”batteries enable users to enjoy music even longer. 7. Standardized 3.5mm stereoxis frequency input juck enable users to connect with other media equipments such as MP3, MP4, Laptop, walkman, etc. 8. The standardized mini USB port enables power supplies directly from PC.