Printers
HP LaserJet 400 Color M451dn reviews
Product specifications and review coverage for this exact model.
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Product overview
HP CE957A-UNITY is listed in the laser printers category. The recorded specifications include print technology: Laser; colour printing: Yes; duplex printing: Yes; wi-fi: No. This entry covers manufacturer code CE957A-UNITY. Specifications relate to this exact source record; other editions or packages may differ.
Automatically assembled from the source specifications. This is a factual summary, not a hands-on review.
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Specifications
Manufacturer code: CE957A-UNITY. Icecat product 25171622 · Checked 22 Sep 2026. The source lists this code for Great Britain. No specifications are transferred from other editions.
Key specifications
The main features to compare for this exact model. Missing details are not assumed.
| Print technology | Laser |
|---|---|
| Colour printing | Yes |
| Maximum resolution | 600 x 600 DPI |
| Duplex printing | Yes |
| Black print speed (normal A4/Letter) | 20 ppm |
| Largest ISO paper size | A4 |
| Wi-Fi | No |
| Ethernet LAN | Yes |
More product specifications
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Display3 details
| Built-in display | Yes |
|---|---|
| Display | LCD |
| Display number of lines | 2 lines |
Processor, memory & storage6 details
| Memory (RAM) | 128 MB |
|---|---|
| Maximum internal memory | 384 MB |
| Built-in processor | Yes |
| Processor frequency | 600 MHz |
| Storage temperature (T-T) | -20 - 40 °C |
| Storage relative humidity (H-H) | 10 - 95% |
Printing, scanning & paper10 details
| Print speed (colour, normal quality, A4/US Letter) | 20 ppm |
|---|---|
| Print margins (top, bottom, right, left) | 4.23 mm |
| Printing colours | Black, Cyan, Magenta, Yellow |
| Number of print cartridges | 4 |
| Total number of input trays | 2 |
| Total output capacity | 150 sheets |
| Maximum output capacity | 150 sheets |
| Paper tray media types | Bond paper, Glossy paper, Plain paper, Pre-printed, Recycled paper, Rough paper |
| Mobile printing technologies | Apple AirPrint, HP ePrint |
| Power consumption (printing) | 425 W |
Connections & wireless2 details
| Standard interfaces | Ethernet |
|---|---|
| Network ready | Yes |
Power & battery3 details
| Power consumption (off) | 0.5 W |
|---|---|
| AC input voltage | 220 - 240 V |
| AC input frequency | 50 - 60 Hz |
Controls & features1 detail
| Operating temperature (T-T) | 15 - 30 °C |
|---|
Design & dimensions6 details
| Colour | Yes |
|---|---|
| Product colour | Grey |
| Width | 405 mm |
| Depth | 484 mm |
| Height | 322 mm |
| Weight | 23.6 kg |
Software & compatibility2 details
| Windows operating systems supported | Yes |
|---|---|
| Mac operating systems supported | Yes |
Further product details9 details
| Maximum duty cycle | 40000 pages per month |
|---|---|
| Recommended duty cycle | 750 - 2000 pages per month |
| Page description languages | PCL 5c, PCL 6, PostScript 3 |
| Total input capacity | 300 sheets |
| ISO A-series sizes (A0...A9) | A4, A5, A6 |
| JIS B-series sizes (B0...B9) | B5 |
| Envelopes sizes | B5, C5, DL |
| Operating relative humidity (H-H) | 20 - 70% |
| Sustainability certificates | ENERGY STAR |
Specifications describe the supplied product data, not measured review results. Battery life, range and performance figures are source claims and can vary with use.
