Please avoid Viewsonic at any cost, never ever go for this product. Service is worst. With in one year you will get some or the other problem and it takes more than month for a service agent to attend the problem.
And after that they provide you the job attend slip and they will tell we don’t have the component and it takes time to come from Chennai, and forget it component never comes.
Please never buy Viewsonic, if you do you will 100% repent.