PLEASE NOTE:Some VGA outputs may not have a strong enough signal for this "passive" splitter. If you're not sure of your signal's strength, our ADP5202H splits and boosts the signal. The ADP5202H supports resolutions up to 1920 x 1440. We also have a low cost alternative splitter & booster for lower resolutions of up to 1024 x 768, the ADP5202.