Our overhead projectors are used as convenient visual tools for teachers who need the ability to write and erase throughout their visual presentations. Rugged and durable, the overhead projectors we feature are made for school use in small sized classrooms and training rooms with dim lighting. They can be used in special education, bilingual and ESL training as well as literacy, reading and other language arts. Be sure to contact our professional customer service representatives@ 888-316-7572 for answers to any questions you may have.