A. Signals/resolutions: The For Retroscaler2x can accept 240p/480i/288p/576i Ntsc/pal sources to converter to 480p/576p Hdmi output (480p for Ntsc, 576p for Pal). For example 240p signals are supported properly, allowing for a completely progressive linedouble to 480p. 480i signals are deinterlaced and doubled also to 480p. Keep in mind that the output resolution of this device only up to 480p/576p. B. Zero Lag: The For Retroscaler2x is a zero lag device, proven using multiple measurements and different devices. C. Region Compatibility: Both Ntsc and Pal signals are supported, but they are not converted to each other. That means you can plug in whatever signal your target device is compatible with, but Ntsc might not work on Pal Hdmi devices and vice versa. D. Filter Modes: The Fil mode is completely preference-based, but the average retro-gamer prefers the Fil mode off for 2d games (for Snes, for Genesis, etc) and on for 3d games (for N64, for Saturn, etc). Also, the Fil mode might help reduce flicker with some 480.