Set of 10 talking calculators provide spoken confirmation of every button pressed—perfect for students with dyslexia or vision-impairment. Also great for simple number-recognition practice for all students! Durable plastic calculator includes a sliding case cover, speaker and headphone jack for use with our headphones (LER 6990) or any standard headphones. An adapter jack is also included for use with our adapter (LER 2901) or any standard adapter. Also includes repeat and adjustable volume functions. Grades K +