With beautiful appearance, powerful file playback capability and mature content ecosystem, LeTV U4 is almost a TV box with no shortcomings. As a fan and a comedy lover, the frequency of using TV boxes on weekdays is not low. When looking for a TV box, the native multimedia file playback naturally became my most concerned feature. The Tmallbox 3Pro that I reviewed last year is a TV box with excellent capabilities in all aspects, but its bright body color makes it somewhat acceptable. And now, I have a higher value of music as U4, which also makes me look forward to its performance. The shape design of LeTV U4 gave me a good impression from the very beginning. It was compared to the sea meidi Q5, which is the crude benzene of my family. The U4's simple black body looks pleasant, while the ultra-slim body instantly kills competitors. Although the material of the fuselage is plastic, the surface of the frosted surface is full of texture and workmanship is solid enough. Of course, for a TV box, designing is not the most important thing, but it should at least fit into your living room environment without showing abruptness. In this regard, LeTV U4 can be said to have exceeded its mission. Here's what goes right. As stated at the beginning of the article, the ability to play multimedia files on TV boxes is my greatest concern. How does the music U4 perform in this area? None of the television boxes should have problems with conventional 1080p x264 video file playback. Unsurprisingly, music as U4 to deal with such documents is completely piecemeal. Then I used a number of 4K clips to test U4's ability to play 4K video. It also performed brilliantly without any stature. When playing H.265 clips (Avatar x264 1080p test sample), U4 can be basically smooth if you don't fast forward. After performing a fast-forward operation, the screen occasionally appears for a few seconds, but this phenomenon does not happen every time, so you don't need to worry too much. The last test video I selected was a sample of Minions (1080p x265 10bit), and U4 was almost impossible to play normally (the screen would jam and never move). It can be seen that although LeTV U4 can barely cope with H.265 encoding, it can basically be said to be incapable of handling 10bit color depth. But then again, asking a 2016 TV box to perfectly support H.265 and 10 bit color depth doesn't make much sense. After all, 4K resolution has only just begun to gain popularity. Therefore, I do not regard this as the shortcoming of LeTV U4. Say video and speak audio. LeTV U4 can support Dolby Digital Plus and DTS-HD audio encoding, support for mainstream audio formats (MP3, APE, Flac, AAC, Ogg). The first thing to note is that there is no 5.1 or 7.1 channel audio system in the author's home. The TV uses a pair of hivi M200MKII 2.0 speakers on weekdays. Therefore, the purpose of this test is to check whether U4's support for these audio encodings and formats is smooth. I can't do anything about the sound effects. In order to test Dolby Digital Plus, I used Dolby's official test file. Although I couldn't figure out 7.1 multi-channel, the effect was normal. However, U4 did not have any problems when playing movies (read and burn, 1080p DTS-HD x264). In terms of format testing, U4 can also play the above-mentioned audio formats perfectly. Nobody just listens to the TV box. After speaking of the hardware capabilities, continue with the software. The test machine for this time is the U4 Member Edition (priced at RMB 399). After registration, the user can receive six months of LeTV Super Video and one month of Super Sports membership. If you usually only watch online content, then cooperation between LeTV and CIBN can provide you with rich video resources. LeTV is a good choice for killing time. There are also many popular movies and TV series for you to watch. Some of the videos in Super Movie provide optional formats such as 4K, Dolby Audio, and 3D. Among them, the 4K resolution provides a significant improvement in picture quality (compared to other lower resolutions), and 1080p Blu-ray movie files. Visual proximity is close, but the required network bandwidth is high. The author uses 100 megabits of fiber at home, basically playing and fast-forwarding. If you, like the author, will access the Internet scientifically and often browse YouTube, then the so-called (pseudo-) ultra-clear and blue-ray quality provided by domestic video websites will certainly be disgusting. But this time, LeTV's 4K online broadcast made me stand out. On the other hand, with the exception of the various kinds of dramas that make people's eyes fly, the 4K movie source in Super Film and TV is not too much. This is somewhat regrettable. Of course, there will definitely be more content to join in the future, and this need not worry too much. Also worth mentioning is that the super film and television is to pay for the purchase, the price is not cheap (49 yuan / month, 490 yuan / year). But if you've had enough of cable TV flooded with mentally handicapped content, this money is worth the investment. As for Dolby audio, I do not know if I am dirty ears or playback equipment is not, anyway, the effect is not too loud. As for the 3D function, there is no need for testing. In general, LeTV U4's software experience is basically qualified, user interface settings are reasonable, navigation is not stuck, and the content ecosystem can be considered a core advantage. As for other scattered features in the system, such as shopping, games, search, etc., this article does not waste time. At the end of the article, let's talk about the choice of different U4 models. LeTV U4 has a total of 3 models, the regular version, the member version, and the Pro Eco Edition. The price is 299/399/499 yuan. U4 Regular Edition has built-in 2GB memory + 8GB storage space, and comes with infrared remote control and 1 month of super sports membership; member version of the configuration and remote control is the same as the ordinary version, but provides 6 months of super film and television members and 1 Month of the Super Sports membership; Pro Eco Edition memory is still 2GB, but the storage space is expanded to 16GB, the remote control supports Bluetooth voice, and provides 12 months of super movie members and 1 month of super sports members. Of the 3 models, the Pro Eco Edition is the most expensive, but it is also the most cost-effective. After all, it costs 490 yuan to purchase a single Super Movie Member. As the core function of U4, if you don't watch super movies, you basically don't need to buy this box. However, if your demand for a TV box is as special as the author, that is to say, if you are playing a multimedia file locally, then the regular version of U4 is also a choice you can consider. After two evaluations of the Tmallbox 3Pro and the LeTV U4, the author found that the TV boxes of the mainstream brands are quite mature. In addition to some innocuous minor flaws, they are fully capable of meeting the needs of most users. As for the ultimate choice, first pick a look that looks pleasing to the eye, and then consider that you are willing to join the content ecosystem. Of course, the content is the more important one of the two. After all, when you buy it back, you watch the video instead of the box.