Designed with a built-in three track magnetic stripe reader for credit/debit transactions, the TT 3101 boasts a 4.5" x 3.3" LCD window - so large it can display line item detail and point of transaction promotions simultaneously. Fully programmable for both text and graphics, the easy-to-read backlit screen displays logos, ads, and administers consumer surveys. The TT 3101 is PIN secure, using either DUKPT or Master/Session key management. If there is an interruption of power to the unit, battery back-up protects valuable data from being lost. Because the TT 3101 utilizes passive pen technology, the unit is virtually maintenance-free --theres never a need for expensive electronic pen replacement. The TT 3101 is rugged, durable, and built to last. For special needs customers, the TT 3101 can be loaded with larger fonts, and its light weight and mounting points allow for secure attachment to a counter stand.