Dell OptiPlex 7440 Owner's Manual page 52

Feature
Internal microphone support
Volume controls
Table 19. Communications
Feature
Network adapter
Wireless
Table 20. Cards
Feature
M.2 slots
Table 21. Displays
Feature
Type
Maximum resolution
Refresh rate
Brightness
Operating angle
Pixel pitch
52
Specification
dual digital microphone
Volume up/down buttons, program menus, and
keyboard media-control keys
WARNING: Excessive sound pressure from
earphones or headphones can cause hearing
damage or loss. Adjustment of the volume control
as well as the equalizer to settings other than the
center position may increase the earphones or
headphones output voltage, and therefore the
sound pressure level. The use of factors
influencing the earphones or headphones output
other than those specified by the
manufacturer(e.g. operating system, equalizer
software, firmware, driver, etc.) may increase the
earphones or headphones output voltage and
therefore the sound pressure level. The use of
earphones or headphones other than those
specified by the manufacturer may lead to
heightened sound pressure level.
Specification
Intel 10/100/1000 Mbps RJ-45 Ethernet
• M.2 2230 card
• combo M.2 card (Intel Wireless 8260 M.2 PCIe WLAN
card (802.11n/ac) with Bluetooth)
Specification
• One 2230 D3 Key-A M.2 Socket 1
• One 2280 D3 Key-M M.2 Socket 3
Specification
23.8 inch, FHD and UHD (4K)
3840 x 2160
60 Hz
Brightness up/down buttons
178 horizontal / 178 vertical
0.2475 mm