There are manny models comes in this series. It has dolby sound which gives a great experience of music. It has acute types keyboard in which you can type very smoothly with less typing mistakes. All this series have all port like usb 3.0 and usb 2.0, lane port, hdmi, And It has vsa port also which you can connect your laptop very easily to projector. If there is any problem like reset. It has Onkey recovery which we can reset our laptop within 30 mintute only.