ART APPLIED RESEARCH AND TECHNOLOGYSPLITMix 4 Four Channel Passive Splitter/Mixer

Does the mixer have screw holes on the bottom for mounting under the desk or to wall?

Hi i would like to listen to music from my phone and my games from my PC in my headset can i do this? and would the sound be Stereo or mono?

When used as a mixer, does this unit effectively isolate the four inputs from each other to prevent backfeeding of signals between devices?

Will this work as a passive headphone splitter/box being driven by a 2 watt amplifier?