Buy an excellent study material for class 12th students in Physics and Mathematics. Use this external hard drive to learn at your own place. This external hard drive contains: 303 hours of 640 video parts with 153 GB size. Supplemented with 1004 pages and 48 MB size of e- study material. It covers Physics and Mathematics of XII standard CBSE and competitive exams like IITJEE Mains and Advance. Validity: 1 year. Compatible OS: Windows XP/7/8 , License: Single Machine with Windows Operating System.