I work in a secondary school but we use ‘C-PEN READER 2’.
You can set them up quite easily e.g. language setting, volume, dominant hand etc. and then the pen is ready for pupils to scan text. No need to set them up every time – only once.
Pupils put the pen to the paper and move it across the text and the pen will read aloud. Earphones are included with each pen as well.
We have found pupils can use these extremely easily so I can imagine they would also be suitable for KS2 students.
Unfortunately I cannot help you with the price as I was not the person who ordered them.
Hope this helps.