Here are the main features of the TI-84 Plus Silver Edition: Processor: 15 MHz Zilog Z80 CPU with a 6 MHz compatibility mode. Memory: 24 KB of user-accessible RAM (out of 128 KB total), and 1.5 MB of user-accessible Flash ROM. Display: Monochrome LCD with 96 × 64 pixels resolution. Power: Operates on 4 AAA batteries plus a backup button cell battery. Connectivity: Built-in USB port for easy connection to computers and other devices. Built-in clock. Preloaded with a variety of applications. Programming support: TI-BASIC and machine code (assembly programming possible). Color-coded keyboard to aid navigation. Compatible with assembly and many programming tools. Physical design: Interchangeable colored faceplates and slide cases available; also has a kickstand-style slide case option.