Offers 480K of FLASH memory, 24K of available RAM memory, internal clock with date and time display, 14 interactive zoom features, and 8-line by 16-character display. Also includes TI Connectivity Cable. Built-in USB port and external cable allow easy, fast data transfers between linked calculations and computers, as well as unit-to-unit file sharing capabilities. Calculator graphs 10 rectangular functions, six parametric expressions, six polar expressions, and three recursively-defined sequences. Powered by four AAA batteries with a Silver Oxide battery backup to protect RAM memory during main battery change.