... optional)Operation system: Android 2.2OS languageinclude but not limited with: Chinese, English, Spanish, Italian, French, Portuguese, Russia, Germany, Arabic & etc ... ,Mini USB: 1,Micro-SD slot: 1 (up to 32GB),Earphone Jack:1,DC IN: 1Speaker: built-in stereo, 8/1WPower source ... 3G USB Dongle, RJ45 convertor, Foldable USB keyboard, leather case with keyboard(pending)