Look at this external hard disk for the combine study of physics and mathematics subject of 11th class. The e- study materials are prepared by experts in the particular field and can be used for detail study of engineering entrance exam preparation . This external hard drive contains: 329 hours of 673 video parts with 162 GB size. Supplemented with 911 pages and 42 MB size of e- study material. It covers Physics and Mathematics of XI 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.