LG 34WN750-B Owner's Manual page 24

Weight (Without Packaging)
The specifications are subject to change without notice.
The power consumption level can be different by operating condition and monitor setting.
* The On mode power consumption is measured with LGE test standard (Full White pattern , Maximum resolution).
** The monitor goes to the Sleep Mode in a couple of minutes(Max 5 minutes).
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With Stand (kg) 8.6
Without Stand (kg) 6.9