RAM : 4GB/8GB/16GB HDD:500GB/1TB OS:Win 7/10 DVD: Built- in DVD RW Keyboard: Chocolate American 99 key suspension keyboard WIFI: 802.11 A/B/G/N Network: Integrated network connector 10/100M Webcam: 2.0M pixel webcam Speaker: Stereo Speaker*2 Shell Material: Aluminum Alloy Metal shel Standard interface USB 3.0*1 USB2.0*2 RJ45*1 Earphone Jack*1 MIC jack*1 Card Reader*1 Power In/out put: Input: 100 ~ 240V 50/60Hz power adapter, Output: 19V,3A Battery:li-battery (3500mah) Color:Black.blue Package details Device dimension: 379mm*249mm*26mm Weight: 2.7kg with package and battery.