Exact model and product class
The Dahua DHI-LM25-B221B is a 24.5-inch Full HD IPS commercial monitor. Dahua’s June 2025 exact-model datasheet calls it a commercial monitor; Bangladesh retailers may market it for gaming because its refresh rate is higher than a conventional office display. For accurate catalog identification, keep DHI-LM25-B221B as the manufacturer model and part number. The previous catalog entry appended screen size and refresh-rate text to the MPN, which made it harder to distinguish the actual model from marketing language.
Full HD resolution and 16:9 workspace
The panel’s native resolution is 1920 × 1080 pixels, presented in a 16:9 aspect ratio. On a 24.5-inch diagonal, that format suits everyday computing, web browsing, spreadsheets, schoolwork and video. It can also provide a responsive Full HD gaming screen when paired with a capable computer or console. The 0.2832 × 0.2802mm pixel pitch and 89.91 pixels per inch are consistent with this screen size and resolution. Users who routinely need multiple dense windows or high-detail design work may instead prefer a higher-resolution monitor.
IPS panel, E-LED backlight and viewing angles
Dahua specifies an IPS LCD panel with E-LED backlighting. The official viewing-angle rating is 178 degrees horizontally and vertically, which helps keep the image usable when viewed away from the center. The datasheet also lists a screen-to-body ratio of at least 90%, Haze 25% surface treatment and 3H hardness. These are panel construction specifications; they do not establish a measured color-calibration profile or a guarantee against glare in every lighting environment.
Brightness, contrast and color reproduction
The manufacturer lists 300 cd/m² typical brightness, a 1500:1 contrast ratio, 16.7 million colors and 85% NTSC typical color gamut. These specifications support general work, entertainment and gaming, with the IPS panel providing broad viewing angles. The 85% NTSC figure is a gamut description rather than proof of factory color calibration. For color-critical photo or print work, buyers should look for measured coverage in the relevant color space and calibration data instead of relying on the word “IPS” alone.
A verified 144Hz refresh rate
The exact-model Dahua datasheet revision 002.000 specifies 144Hz. It lists both DP 1.4 and HDMI 2.0 input timings at 1920 × 1080 and 144Hz. This resolves the catalog conflict: the current 120Hz headline understates the official specification, while the recorded DP 320Hz and HDMI 240Hz timings are not supported by Dahua’s datasheet. A 144Hz display can show up to 144 refreshes each second when the source device sends a matching signal; the actual frame rate depends on the computer, graphics hardware, game and settings.
Understanding the 1ms MPRT figure
Dahua publishes a 1ms MPRT response rating. MPRT describes motion-picture response and should not be presented as a 1ms gray-to-gray (GtG) measurement. The datasheet does not state a 1ms GtG value. Keeping the metric label beside the number prevents a common specification mix-up and helps set a fair expectation: the monitor advertises a motion-clarity measure, but that alone does not describe every pixel transition or eliminate all motion artifacts.
DisplayPort 1.4 and HDMI 2.0 connections
The monitor provides one DisplayPort 1.4 input, one HDMI 2.0 input and one audio-out port. Dahua’s input timing table associates 1920 × 1080 at 144Hz with both DP and HDMI. That makes the documented maximum refresh accessible over either video connection, provided the graphics source, cable and selected display mode support the same timing. The catalog previously described HDMI as version 2.1 and assigned 240Hz; the manufacturer lists HDMI 2.0 and 144Hz. Do not choose a cable or graphics setting based on the old unsupported figures.
Sound and the audio-out port
The datasheet lists a single audio-out port but does not list built-in speakers. That is an important buying detail for users who expect sound directly from the screen. Audio can be played through compatible headphones or external speakers connected through the audio output, depending on the source and monitor signal routing. If built-in sound is a must-have, confirm the specification with the seller before ordering rather than assuming that every monitor includes speakers.
Tilt stand and VESA mounting
Dahua lists a tilt range from −5° ± 2° to +20° ± 2° and a 100 × 100mm VESA mounting pattern. The official sheet does not specify stand swivel or height adjustment, so this audit leaves those values as unspecified. The monitor can be positioned on its supplied tilt stand or attached to a compatible VESA arm or wall bracket. Check the arm’s supported load, screw length and mounting instructions before installation.
Dimensions, mass and desk planning
The monitor body measures 557.7mm wide, 330.6mm high and 58.1mm deep without the wall-mount bracket. Dahua lists a net weight of 2.9kg. The shipping package is larger—620 × 431 × 134mm—and weighs 3.9kg gross. Distinguishing body measurements from the boxed package avoids confusing the dimension and weight fields used for desk fit, shipping or lifting. Leave space for the stand, connected cables and ventilation when planning a desk layout.
Power supply and energy figures
The manufacturer specifies an external 12V DC, 2.5A power adapter. Listed consumption is 18W basic, 19W typical and 23.8W maximum, with standby below 0.5W. These values describe the monitor’s electrical requirements; the exact supplied cable and adapter package should be confirmed with the Bangladesh seller. Use the correct rated supply and avoid substituting an adapter with unsuitable voltage or polarity.
Using the monitor for work, study and gaming
At 24.5 inches, 1920 × 1080 and 144Hz, the LM25-B221B can serve as a general-purpose screen for browsing, office applications, classes and entertainment, while also offering a smoother refresh ceiling for supported games. It is a conventional 16:9 Full HD panel rather than an ultrawide or high-resolution productivity display. Users should match their expectations to the stated resolution and refresh rate and confirm that the chosen input can be driven at 144Hz by the source device.
Accessories included with the standard package
Dahua’s exact-model datasheet lists a power adapter, the monitor base/stand, an HDMI cable, a user-manual QR code and legal/regulatory information as standard accessories. The datasheet also gives the boxed measurements as 620 × 431 × 134mm and gross package weight as 3.9kg. The local seller should still confirm that the item supplied is the same package revision and that the base, power adapter and cable are present before dispatch.
What the product images show
The supplied gallery contains three product views: a straight-on view with the stand, an angled view that shows the slim side profile and a rear view of the chassis and stand. These images help shoppers understand appearance and mounting context. The photos do not expose readable regulatory labels, actual brightness, color calibration or port version markings. Those details are therefore taken from the exact-model manufacturer datasheet.
Bangladesh price and warranty context
On 3 November 2026, exact-model Bangladesh listings observed by Antigravity and web research ranged from BDT 13,200 to BDT 14,600; the authorized Excel Technologies listing showed TBA. These are external retailer observations and can change with stock, payment method and promotion. The official Bangladesh distributor and several local retailers list three-year official warranty. Confirm the warranty provider and claim process on the invoice and card.
Who should consider this monitor
The DHI-LM25-B221B is a reasonable candidate for shoppers wanting a 24.5-inch IPS Full HD display with a documented 144Hz maximum on both major video inputs, broad viewing angles and standard VESA compatibility. It is less suitable for people who need a built-in speaker, height-adjustable stand, a higher pixel density, or verified color-critical performance. Checking the exact model code, input capability, adapter and written warranty before purchase will help align the listing with the intended setup.
Verified key features
- 24.5-inch Full HD 1920 × 1080 IPS display with E-LED backlight and 16:9 aspect ratio.
- 144Hz refresh rate, with official 1920 × 1080 @ 144Hz signal timing on both DisplayPort 1.4 and HDMI 2.0.
- 1ms MPRT response rating; Dahua does not label this as a 1ms GtG measurement.
- 300 cd/m² typical brightness and 1500:1 contrast ratio per official datasheet.
- 85% NTSC typical color gamut, 16.7 million display colors and 178° horizontal/vertical viewing angles.
- One DP 1.4 input, one HDMI 2.0 input and one audio-out port; no built-in speakers are listed in the official specification.
- Tilt adjustment from approximately −5° to +20°; 100 × 100mm VESA wall mounting.
- 557.7 × 330.6 × 58.1mm body without wall-mount bracket; 2.9kg net weight.
- 18W basic, 19W typical, 23.8W maximum power consumption; external 12V DC, 2.5A power adapter.
- Package dimensions 620 × 431 × 134mm and gross weight 3.9kg; Dahua lists a power adapter, base/stand, HDMI cable, manual QR code and legal/regulatory information as standard accessories.
Advantages
- 144Hz refresh improves motion smoothness over standard 60Hz displays when the computer can deliver a matching frame rate.
- Both DP 1.4 and HDMI 2.0 are specified for Full HD at 144Hz, so either input can use the documented maximum timing.
- IPS viewing angles and 300 cd/m² typical brightness suit mixed office, study and entertainment use.
- 85% NTSC typical gamut and 1500:1 contrast provide a richer specification than basic office panels in this price segment.
- Tilt stand plus 100 × 100mm VESA compatibility allows desk placement or compatible arm/wall mounting.
Considerations
- Resolution is Full HD at 24.5 inches; users seeking finer text detail or more workspace may prefer a higher-resolution panel.
- The 1ms rating is MPRT; Dahua does not specify 1ms GtG in the datasheet, so those figures are not interchangeable.
- No built-in speaker is listed; plan for headphones or separate speakers if audio is needed.
- The stand is listed with tilt only; swivel and height adjustment are not specified for the supplied stand.
- Warranty durations differ among Bangladesh retailer listings, so confirm the coverage and provider on the invoice.
Frequently asked questions
What is the exact Dahua model number?
The manufacturer model is DHI-LM25-B221B, also abbreviated LM25-B221B in retailer titles. The 24.5-inch size and “120Hz” are not part of the model number.
What is the maximum refresh rate?
Dahua’s exact-model datasheet revision 002.000 specifies 144Hz. It lists 1920 × 1080 at 144Hz on both DP 1.4 and HDMI 2.0. Some listings still show an older 120Hz figure.
Do HDMI or DisplayPort support 240Hz or 320Hz?
No. The official datasheet specifies HDMI 2.0 and DP 1.4, each at 1920 × 1080 and 144Hz. The old catalog’s 240Hz HDMI and 320Hz DisplayPort figures are incorrect.
Is the panel IPS and what is its resolution?
Yes. It is a 24.5-inch IPS LCD with E-LED backlight and native Full HD resolution of 1920 × 1080 in a 16:9 format.
What does the 1ms response-time claim mean?
Dahua specifies 1ms MPRT. MPRT is a motion-picture response metric and is not the same as a gray-to-gray (GtG) response-time measurement; the datasheet does not state a 1ms GtG value.
What are the brightness, contrast and color-gamut specifications?
The official datasheet lists 300 cd/m² typical brightness, 1500:1 contrast, 85% NTSC typical color gamut and 16.7 million display colors.
Which video ports are included?
The monitor has one DisplayPort 1.4 input and one HDMI 2.0 input. Dahua specifies 1920 × 1080 at 144Hz on each input, plus one audio-out port.
Does this monitor have built-in speakers?
Dahua’s exact-model datasheet lists one audio-out port but no integrated speakers. Use headphones or an external speaker for audio.
Can it be mounted on a monitor arm, and what adjustments are available?
The datasheet lists 100 × 100mm VESA mounting and tilt from approximately −5° to +20°. It does not specify stand height adjustment or swivel. Check that an arm supports the VESA pattern and 2.9kg net weight.
What are its dimensions and weight?
The monitor body measures 557.7 × 330.6 × 58.1mm without a wall-mount bracket and weighs 2.9kg net. The package measures 620 × 431 × 134mm and weighs 3.9kg gross.
What warranty applies in Bangladesh?
Excel Technologies, an authorized Dahua distributor in Bangladesh, and several retailers list three years of official warranty. Check the exact seller invoice and warranty card for provider and claim terms.
What is the current price in Bangladesh?
On 3 November 2026, exact-model Bangladesh listings observed by Antigravity and web research ranged from BDT 13,200 to BDT 14,600. Prices and stock change by seller; this comparison does not describe BiponiBD’s own current offer.
Specifications are based on Dahua’s exact-model datasheet revision 002.000. Bangladesh prices and warranty terms vary by seller; confirm current availability, package accessories and written warranty before purchase.
