Original sentence: Some manufacturers have provided a unified system where the whiteboards, short throw projection system and audio system are all combined into a single unit which can bet set at different heights and enable young children and those in wheelchairs to access all areas of the board
Edited sentence: Some manufacturers have provided a unified system where the whiteboards, short throw projection system and audio system are all combined into a single unit which can be set at different heights and enable young children and those in wheelchairs to access all areas of the board