This language exercise 'auditory synthesis' contains 10 sets each mmkm 10 words (100 words). First select your sequence. Click on the speaker (one or more times). The search word is phonetically pronounced with individual letters. Try to speak aloud the word to search and click on the matching print. When an error occurs, you hear an error. For a correct answer you hear the word. Do as the 10 words. At the end you see your result (%). You come back automatically after 5 seconds on the home page. Headphones make the sound even better. Works best on tablets. Not suitable for smartphones. Black screen = charging time (+/- 30 sec).