... keyboard,Visual presenter,Hi-fi speaker,wireless microphone touch screen all in one pc is a high performance machine, equipped with ... Audio and sound system. 4. Touch Screen 5. Built-in HIFI Speaker6. Built-in Microphone7. Built in WIFI802.11N 8. HDD 500G9 ... and sales company, specializing in the manufacture and export of all-in-one PC, such as touch-screen all-in-one PC ,document scanner, visualizer ...