Look at this video lecture hard disc for mathematics and biology by M-Learning. These lectures are prepared by experienced and famous lecturers. This external hard drive contains: 560 hours of 1106 video parts with 270 GB size. Supplemented with 2268 pages and 105 MB size of e- study material. It covers Mathematics and Biology of XI, XII standard CBSE and competitive exams like IITJEE mains, IITJEE Advance, AIPMT and AIIMS. Validity: 2 years. Compatible OS: Windows XP/7/8 , License: Single Machine with Windows Operating System.