Print speed of 5 lines per second Slide switch to select running subtotal or grand total Enclosed paper roll to protect from dust build up (read our blog on the enclosed paper roll) Indicator lamp (making users aware of an active calculation) Automatic total print above tear-off knife Hidden storage compartment for a spare paper roll and a twin-spooled ribbon to reduce downtime Independent operation of multiplication and division capability, enabling the user to multiply and divide during addition and subtraction