Overview of Lanchen BM-870

Current means of transportation are increasingly equipped with audio and video playback equipment? Whether it is an airplane or a train, or even a long/short-distance bus, The car LCD has become a video output terminal, releasing information, or relieving people's emptiness and loneliness during their journey. However, there seems to be no trend to add this equipment to more and more private cars. The BM-870 recently launched by Lanchen is an MP4 with car functions. At the same time, this product has a large 8.9-inch screen (resolution up to 1024?600), which has exceeded the previous largest 7-inch screen of conventional MP4, which is spectacular.

Lanchen BM-870

In addition to having suction cups and brackets for vehicle applications, Lanchen BM-870 also has a unique FM transmitter function, which further demonstrates the product’s vehicle use positioning? It can be received through the car radio and then played through the car speaker system to achieve smooth playback in a relatively noisy environment.

Vehicle mount

Vehicle installation diagram

With a large screen, in-vehicle application functions, and OTG function, Lanchen BM-870 has become a powerful performer , products with complete functions. With significantly higher specifications, this MP4 will become a bright spot on the market. Below we will analyze the BM-870 in detail.

Packaging and main body appearance of Lanchen BM-870

Corresponding to the large screen, the packaging of Lanchen BM-870 is also much larger than that of common MP4s, and there is a special handle on the top for easy carrying. , is a considerate design. In addition, the screen on the front of the package plays car footage, which also shows the application positioning of this product.

Lanchen BM-870 packaging

Packaging details (optional)

Packaging details include HD logo (Lanchen BM-870 supports 768P and H.264, etc. HD format), vehicle installation instructions, and portrait of the endorser Wilber Pan.

Lanchen BM-870

In terms of main appearance, it should be said that BM-870 is indeed very shocking? Many colleagues who saw this product will mention that it looks like A small TV. We should give a reference for comparison, but here we still use data to explain the size of the screen? An 8.9-inch screen means that the diagonal length of the screen is 22.6cm, and the length of the screen (top and bottom edges) is about 1cm shorter than the width of the A4 paper. look like.

Super large screen

The super large screen occupies most of the main body. The buttons and interfaces are all placed sideways to avoid affecting the visual effect. We noticed that Lanchen BM-870 uses a black frame. This design is more beneficial for video playback? The dark frame can help the viewer concentrate, and the red treatment of the speaker prevents the user’s fingers from blocking the sound. .

Lanchen BM-870 Family Portrait

Remote Control

Lanchen BM-870 accessories are very complete? Various connecting cables, remote controls, mounting brackets, FM antenna, and white earplugs provided as a gift.

Appearance details and controls of Lanchen BM-870

The nominal thickness of the body is 1.63cm, which is slightly thinner than a dime.

Thickness of Lanchen BM-870

Lanchen BM-870 Speaker

The speaker of Lanchen BM-870 is obviously larger in diameter than the common MP4? This is also consistent with other Matching body shapes. In addition, in specific trials, the volume of this MP4 was significantly larger than that of common products, which is also due to the large-diameter speakers.

Lanchen BM-870 top buttons

The buttons are all set at the top. During system operation, the track switching button is used to switch major items, and the small items are switched by the volume button.

Lanchen BM-870

All interfaces are set on the right side of the body, including HDMI, miniUSB, TVout, headphones, TF card slot, switch button and charging port. As you can see from the picture above, the back also has a stand for desktop use.

The UI interface of Lanchen BM-870

The UI interface is clear and simple. According to the function, the currently selected item will be prompted by flashing.

When it comes to screen shooting, since the screen of Lanchen BM-870 is surprisingly large, it is difficult to display clear pictures with our regular 500-pixel wide picture, so all pictures for this review are acceptable.

Setting function

For specific application projects, there are local disk, TF card and USB peripheral projects to choose from. Press SET on the top of the machine during the process of selecting files. Press ? to perform file operations. The OTG function is realized through the USB interface, and the expansion is more optional.

Lanchen BM-870

System information

The system information in the setting function can read the capacity of the corresponding storage device and the firmware version of the machine? Lanchen BM-870 supports firmware upgrades, and you can obtain more functions and format support through subsequent official firmware upgrades.

Music playback control

In addition to selecting operation items from the UI interface, while each function is in progress, the function can still be fine-tuned through the SET key.

Real shots of reading and writing speed and display effect

For reading and writing speed, we use WinXP SP2+ATTO 2.43 for testing, and the test file size is 256MB. After testing, the reading speed of Lanchen BM-870 is 11.2MB/s, and the writing speed is about 8.5MB/s, which is already at a high level? Especially the writing speed is relatively fast, which is especially economical in large file transfers. Time, it can also be seen that Lanchen is still very good in the selection of internal memory chips.

Lanchen BM-870 reading and writing speed test results

The display effect is still compared with the original image and the actual photo. One thing that needs to be pointed out is: LCD The brightness is the highest level five by default for this machine.

Original picture 1

Display effect 1

Original picture 2

Display effect 2

Original picture 3

Display effect 3

Original image 4

Display effect 4

Original image 5

Display effect 5

From the actual perspective, the display effect of BM-870 is better than that of the pictures taken. The pictures are delicate, and the grayscale and gradation performance are good. However, the main body tone is warmer and the contrast is not perfect. .

Audio and video playback test

Our digital product test has a basic set of specific film sources, which we also introduced to you in previous reviews. The following is still given in the form of a list. For general tests, as long as there is no problem with the format, we will continue to use this set of film sources. During the chase moments of two of the content, which are both the same length, the bitrates are 7.3Mb/s and 16.8Mb/s respectively. The peak of the latter is a terrifying 53Mb/s; in addition, the bitrate of Flying House Travel Notes The peak value is 30Mb/s, which has exceeded the 20M limit in the manual, but we found that this player can still play smoothly and completely. In addition, there are two MPEG2 format videos with an average bit rate of 10Mb/s-20Mb/s.

Title

Resolution

Encoding format

Bit rate

Number

Chasing time 1.RMVB

1280x720

RV40/H.264

Average 16.8 Peak 53

A

Chasing Time 2.RMVB

1280x720

RV40/H.264

Average 7.3 Peak 16

B

Tokyo Drift.AVI

1280x720

H.263/Xvid

Average 18.6

C

Flying House Travel Diary.RMVB

1280x720

RV40

Average 13.5 Peak 30

D

Mechanical Public Enemy.MPG

1280x720

MPEG2

Average 10.1M

E

Astro Boy. MOV

1920x800

H264/AVC

Average 8.1M

F

Landscape demo film.TS < /p>

1920x1080

MPEG2

Average 19.97M

G

Very human trafficker.MKV

AVC1

5.9MB

H

The final result is beyond our expectations? Play it on a common controller There will be segment A that is not smooth, and it will not be laggy until the second half. In addition, the performance of segment H is relatively poor, with a higher degree of disfluency.

Product model

A

B

C

D

E< /p>

F

G

H

Yinyuehui T6

Lukeka

Smooth

Not supported

Smooth

Not supported

Not supported

Not supported

Test results

Video playback control

There are many adjustment options for video playback, including viewing file information and scaling the video ratio. (Including video ratio full screen/screen ratio full screen/original size), and visual effect selection (including very sharp/sharp/natural/soft/very soft). It also includes subtitles, LCD backlight and other adjustment items.

What also needs to be mentioned is the most prominent advantage of Lanchen BM-870 itself? It has a large 8.9-inch screen, which is very helpful when watching videos, plus the support of the internal high-definition chip , the video viewing scene is grand and the details are clear, which is absolutely shocking + enjoyable.

Music playback and sound quality experience

It must be said that the speaker of Lanchen BM-870 is indeed very loud. The maximum volume for single-person near-field application can definitely reach the level of harshness. It should be It can be adapted to multi-person applications and also corresponds to the characteristics of large screens.

Lanchen BM-870 speaker

Music playback

The thrust of Lanchen BM-870 is acceptable. Turning the volume to about half can play a better role in headphones. push. In terms of playback control, you can choose the loop mode, etc. In addition, it also has a lyrics display function, which is very user-friendly.

Playback mode

Lyrics control

In terms of sound quality, the overall performance of this MP4 is relatively flat, with better mid- and high-frequency performance.

E-books and other functions

The e-book function of Lanchen BM-870 supports txt text reading, the text performance is acceptable, and it still uses the highly praised parchment base. When watching, you can use the SET key to bring up the control menu, set bookmarks, adjust fonts and colors, and switch between horizontal and vertical screen displays, which is very user-friendly. Of course, the background can also be changed.

E-book display

Large font display effect

E-book adjustment options

Recording function

Recording function The default is 320kbps MP3. Of course, you can choose a low bit rate recording quality, but even for the 8GB version we tested, it can still save recording files of sufficient length. In terms of recording quality, the microphone collection effect is very good. It has good collection of sounds within two or three meters. There is also a volume display during recording, which is a very practical function.

Game functions

Lanchen BM-870 only comes with one game at random, backgammon, a very simple mini-game. Users can play against the computer if they are interested. Maybe Lanchen will follow up Will the firmware update re-add games?

In terms of ancillary functions, the settings of this player are still relatively practical.

Screen viewing angles and general comments

The viewing angles of Lanchen BM-870 are good, with wide viewing angles for left and right viewing. When viewing up and down, it is still a common top view. It's brighter and darker when looking up, but the degree is relatively slight.

If we talk about the overall experience, the most outstanding thing is the super large screen? The 8.9-inch large screen is really something I have never seen before, and it is also the main factor that caused this product to attract the attention of colleagues around me. . And the powerful external speakers also make this product an MP4 that can be enjoyed by many people? Of course, this is also considering the possible car applications. It should be said that it is still very good for long-distance travel, but the driver It’s better not to play it while gays are driving.

In general, the huge LCD of Lanchen BM-870 can be called a cosmic giant, and the gorgeous appearance with a Ferrari flavor is also

Lanchen BM-870

Fashion digital products have excellent external qualities. If not mentioned enough, perhaps the paint treatment could be smoother. As of the time of writing this article, we have not yet learned the specific launch price of this product. In short, BM-870 has aroused speculation among colleagues around the author. It is indeed an exciting product.