Buy an excellent study material for class 12th students in Biology and Math. Use this external hard drive to learn at your own place. This external hard drive contains 208 hours of 420 video parts with 99 GB size. Supplemented with 997 pages and 45 MB size of e- study material. It covers Biology and Math of XII standard CBSE and competitive exams like IITJEE mains, IITJEE Advance, AIPMT and AIIMS. Validity: 1 year. Compatible OS: Mac , License: Single Machine with Mac Operating System.