Back ViewSide ViewFront panel controlsLabel Description1 Input Source select2 OSD Menu/Select button3 Brightness & Contrast/Down (-) button4 Auto-adjust/Up (+) button5 Power button (with power light indicator)Back view Back View with monitor standLabel Description1 VESA mounting holes (100mm)(Behind attached base plate)Use to mount the monitor.2 Barcode serial number label Refer to this lable if you need to contact Dell fortechnical support.3 Security lock slot Use a security lock with the slot to help secure yourmonitor.4 Dell Soundbar mounting brackets Attach the optional Dell Soundbar.5 Regulatory rating label Lists the regulatory approvals.6 Stand removeal button Press to release the stand.7 Cable management hole Help organize cables by placing them through the hole.8 Lock down/release button Push the monitor down, press the button to unlock themonitor, and then lift the monitor to the desired height.