Does it work with 4K projectors?

The LF1 outputs up to 1920x1080 resolution and and LFC outputs up to 1920x1200 resolution. Thus LF1 and LFC works with 4K projectors that accept HD input, but will only result in HD content.  Most 4k projectors accept 1080p input and natively upsample the 1080p content to 4K resolution.