In reading, reading with IPOD is very troublesome. The e-books it can open are very small, so you have to divide them into many with a divider, which is very troublesome! You will regret buying a book! Both Samsung's computers and e-books have a shock-absorbing sliding effect. If you haven't used it before, it will take a long time to get used to it, and the text interval is relatively large, so it seems that CP3 can't locate it quickly. Iriver E series is better, and Iriver's reading is still very good, but e series is not a touch screen, so it will be compared with Touch when reading. P7 reading is quite reliable, but personally, P7 reading is too big, and a machine with a thickness of 4.3 inches and one centimeter can recite it at any time. Even if you use a bracket, you should watch a video, right? S9 e-books are pretty cool. There is a slider under the e-book interface and the picture interface, which is similar to the unlocking interface of IPHONE, but the effect is completely different. S9 can be enlarged from left to right, which is very user-friendly. You can park anywhere, but S9 is more expensive! I think E200 is good for students! More DVD playing functions than E 150! The price is 699.4g! If you have rice, you can consider S9! I9！ I9 doesn't have the up, down, left and right keys, all of which are sideslip. It will take some time to start. I still recommend E200, which is cheaper than I9! oppo！ Overall, 39 is not bad. Just released a new firmware, battery 1800 mAh, but 39 is a standard man-machine phone. If the landlord likes oppo, you can choose s33! The pink one is very good, 700 yuan 4g.