It's a bracket for KCEVE KC-KVM401A KVM switch for mounting it on VESA plate.
On photos it's combined with https://www.thingiverse.com/thing:1935823 pole bracket but also can be used with any VESA 75-100 plate.
STL should be printed two times, one stright and one mirrored. Besides that you'll also need
Mounting holes prints better with supports but it's not really a requirement.
The author marked this model as their own original creation.