Acer KG1 KG281KA 71.1 cm (28") 3840 x 2160 pixels 4K UHD LCD Monitor Compatible processor series___Intel® Celeron®. Intel® Core™ i3. Intel® Core™ i5. Intel® Core™ i7. Intel® Core™ i9 efficiency and stable performance for efficiency and stable performance for all compatible Intel processors Swedish Plug and Play Yes Multimedia Number of speakers 2 Built in speaker(s) Yes RMS rated power 4 W Built in camera No TV tuner integrated No Power Power cable length 1 horizontal 170° Maximum refresh rate 60 Hz Dynamic contrast ratio marketing name Adaptive Contrast Management (ACM) Contrast ratio (dynamic) 100000000:1 Screen shape Flat Display brightness (typical) 330 cd m² Backlight type LED Panel type TN HD type 4K Ultra HD Touchscreen No Display technology LCD Native aspect ratio 16:9 Display resolution 3840 x 2160 pixels Display diagonal 71 1 cm (28") Performance Operating system installed Windows 10 AMD FreeSync Yes Multimedia RMS rated power 2 W Number of speakers 2 Built in camera No Built in speaker(s) Yes Design Certification MPR II Feet colour Black Illuminated stand No Product colour Black Market positioning Gaming Ports & interfaces AC (power) in Yes Headphone out Yes HDMI ports quantity 1 HDMI Yes Built in USB hub No Ergonomics Tilt adjustment Yes Tilt angle range 5 15° Panel mounting interface 100 x 100 mm VESA mounting Yes Power Power consumption (typical) 55 W Energy consumption (HDR) per 1000 hours 48 kWh Energy consumption (SDR) per 1000 hours 34 kWh Energy efficiency class (HDR) G Energy efficiency class (SDR) G Packaging content Cables included AC