Here are the full specifications of the HP LaserJet MFP 137fnw:

🖨️ Printing

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  Print technology: Monochrome laser
  
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  Functions: Print, Copy, Scan, Fax
  
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  Print speed: Up to 20 pages per minute (A4)
  
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  Print resolution: Up to 1200 × 1200 dpi
  
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  First page out: As fast as ~8.3 seconds
  
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  Monthly duty cycle: Up to 10,000 pages
  
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  Recommended monthly volume: 100 to 2,000 pages
  

📠 Copying

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  Copy speed: Up to 20 copies per minute
  
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  Copy resolution: Up to 600 × 600 dpi
  
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  Maximum copies: Up to 99 copies
  
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  Zoom range: 25% to 400%
  

📄 Scanning

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  Scanner type: Flatbed + ADF (Automatic Document Feeder)
  
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  Scan resolution (optical): Up to 600 × 600 dpi
  
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  ADF capacity: 40 sheets
  
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  Scan formats: PDF, JPG, PNG, TIFF, BMP
  
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  Max scan size: A4 / Legal (ADF support)
  

📠 Fax

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  Fax type: Black & white and color (send only)
  
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  Modem speed: 33.6 kbps
  
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  Fax memory: Up to 400 pages
  
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  Speed dials: Up to 200 numbers
  

📶 Connectivity

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  Wi-Fi (802.11 b/g/n)
  
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  Ethernet (LAN)
  
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  USB 2.0
  
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  Mobile printing: HP Smart app, AirPrint, Mopria, Wi-Fi Direct
  

📥 Paper Handling

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  Input tray: 150 sheets
  
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  Output tray: 100 sheets
  
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  Supported sizes: A4, A5, B5, envelopes, custom sizes
  
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  Paper types: Plain, thick, thin, labels, recycled, cardstock
  

⚙️ Performance

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  Processor: 600 MHz
  
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  Memory: 128 MB
  
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  Display: 2-line LCD
  
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  Duplex printing: Manual only
  

🔋 Power & Physical

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  Power consumption: ~300W (printing), 38W (ready), 1.9W (sleep)
  
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  Weight: ~8.6 kg
  
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  Dimensions: ~422 × 424 × 309 mm
  

🧾 Cartridge

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  Toner: HP 106A Black toner
  
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  Yield: ~1,000 pages (standard cartridge)