12 digit calculator is perfect for the everyday advanced user, especially in a busy office setting. Heavy duty durability is perfect for power users. Works both as a stand-alone desktop printing calculator or connected to your PC allowing you to send your calculation results directly to your computer program for easy analysis in spreadsheets, can also be used as a numeric entry keypad. Made of 45% recycled plastic. Contemporary black styling compliments any modern desktop decor. You can count on the fast and reliable 4.6 lines-per-second ribbon printer. Cost/sell/margin keys make for quick and easy profit margin calculations (simply enter two variables and the third automatically appears). Other functions include two independent tax keys, time/date, change sign key, item count, fully selectable decimal settings, selectable rounding switches, units price mode, grand total key, percent key, sigma key, backspace key, date/non-add key, and 4 key independent memory. Includes wireless USB. Compatible with Windows 98/98SE/ME/2000/XP/7 and Apple based operating systems. AC Power. 3-year manufacturer's standard warranty.