* World patent: convertible shells from 3" CD to 5" CD (8cm~12cm)
* Playable disc: CD, multi-session CD, CD-R, CD-RW
* Playable format: CD-DA, MP3, VCD(audio only)
* ESP: 480 sec (MP3), 45 sec (CD)
* Supports CD with mixed bit rate
* Variable bit rate 32K~320K
* CD programming CDs
* Forward/reverse scan
* Hold switch
* Extra bass switch
* MP3 per-track variable bit rate
* Changeable panels
* Material: plastic (ABS)
* Color: ---Body: silver
               ---Wing: Blue(Free extra wing in different color)
* AC/DC adapter (DC 4.5V)
* Earphone jack (3.5 mm)
* Earphone : Dr. designed patent protective .
* Type of battery: 2 1.5V AA/ Alkaline batteries
* Rechargeable batteries supported(only NI-MH)
* Charging time: 12 hours
* Battery life: 6 to 7 hours for CD, 8~10 hours for MP3