There are three key differences: (1) Environment — outdoor displays are weatherproofed, indoor displays are not. (2) IP Rating — indoor displays are typically IP31; outdoor displays start at IP54 and go up to IP68 in our T960B model. (3) Brightness — indoor displays output 1,000–2,000 nits for controlled lighting; outdoor displays need 3,000–7,000 nits to compete with direct sunlight.