Hercules Smart TV USB 2.0 External. Analog signal format system: PAL BG/DK, SECAM L/PAL I. Interface type: USB 2.0 . Minimum RAM: 256 MB, Minimum hard disk space: 5000 MB. LED indicators: Power-on. Audio output: Stereo, Minimum system requirements: Pentium III 1GHz CD/DVD-ROM drive USB port Sound card and speakers or headphones, Compatible operating systems: Windows XP