Selling my computer monitor. It has a stunning 4k IPS panel with excellent color profile. If you are looking for a 24 inch 4k display, look no further than this model. Amazon asks for $340 before tax for used-in-good-condition. It works for either windows or mac OS. Some specs: With 99% sRGB color coverage, and a factory color calibration report to certify that each monitor arrives at a deltaE of <3, youcan be sure that colors are as accurate as they can be Maximize your viewing options by adjusting the monitor to your desired height, or easily tilt or swivel to your preferred angle.Pivot from landscape to portrait view to easily see full pages at a glance.Please Note: Kindly refer the User Guide before use.Dimensions (With Stand):Height (compressed / extended): 369.53mm (14.55") / 499.53mm (19.67"), Width: 566.64mm (22.31"), Depth: 205mm (8.07"): Dimensions (Without Stand):Height: 336.06mm (13.23"), Width: 566.64mm (22.31"), Depth: 46.93mm (1.85") Customize your viewing experience with the height adjustable stand, or save valuable desktop space by detaching the stand forwall mounting with a VESA-compatible 100mm x 100mm wall mount kit (wall mounting equipment sold separately) This product does not have inbuilt speakers. There is a Speaker-line out.Contrast Ratio:1000 to 1 (typical) 2 million to 1 (DCR).The pixel clock rate for HDMI is sufficient to allow 1080p and WUXGA (1920×1200) at 60 Hz. Vertical refresh rate - 29 - 76 Hz Compatibility- All Operating System. Power requirement:100-240 VAC / 50 or 60 Hz ± 3 Hz / 1.8 A (maximum). Designed For Dell OptiPlex 3040. Response Time- 8 ms (typical); 6 ms (gray-to-gray)