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Shipping environment
Maximum shipping temperature: -40° to 60° C (-40° to 140° F)
Maximum shipping humidity: 5 to 90% RH non-condensing
Electrical specifications
Power supply
Universal power adapter (internal)
Power requirements
Input voltage: 100 to 240 VAC, 50/60 Hz
Output voltage: +32V/+12V at 1095 mA/170 mA
Power consumption
34 watts printing (Fast Draft Mode)
Acoustic emission specifications
Print in Draft mode, noise levels per ISO 7779
HP Officejet Pro 251dw
• Sound pressure (bystander position)
LpAm 60 (dBA) (mono Draft print)
• Sound power
LwAd 6.7 (BA)
Memory device specifications
This section contains the following topics:
•
Memory card specifications
•
USB flash drives
Memory card specifications
Specifications
• Maximum recommended number of files on a memory card: 2,000
• Maximum recommended individual file size: 12 megapixel maximum, 10 MB maximum (TIFF
files, 50 MB maximum)
• Maximum recommended memory card size: 64 GB (solid state only)
NOTE: Approaching any of the recommended maximums on a memory card might cause
the performance of the printer to be slower than expected.
Supported memory card types
• Secure Digital (SD), Mini SD, Micro SD, SDXC
• High Capacity Secure Digital
• MultiMediaCard (MMC), MMC Plus, MMC (RS-MMC)
USB flash drives
HP has fully tested the following USB flash drives with the printer:
• Kingston: Data Traveler 100 USB 2.0 flash drive (4 GB, 8 GB, and 16 GB)
• Lexar JumpDrive Traveller: 1 GB
• Imation: 1 GB USB Swivel
• SanDisk: Cruzer Titanium plus USB Flash Drive 4 GB PN
• HP: 8 GB HI.SPEED USB flash drive v100w
Printer specifications 97