A visualiser is simply a digital camera fixed on the end of an arm and allows you to zoom in and out, freeze and capture an image of whatever is positioned under the camera. Visualisers have the ability to connect to other forms of technology, such as projectors, interactive whiteboards, PC / laptops and TVs. Visualisers have the ability to connect to virtually any projector, interactive whiteboard or PC Monitor showing any image to your audience, or saving an image to be used or recalled later. Visualisers are ideal to have in school classrooms and science lab as you can also position the visualiser to show what the teacher is doing live in the classroom (during a science experiment, for example), which means that the whole class are able to see what is happening without having to crowd around a desk.