Casio FX-720P

Keyboard: QWERTY calculator type 54 keys with numeric keypad
CPU: HD61913 CMOS VLSI
Speed: 455 kHz ceramic resonator used as system clock
RAM: one RAM card with 2kB or 4kB
RAM available: 1536 / 3616 Bytes
ROM: 27 kB
Text: 1 rows x 12 cols.
Sound: Dual tone beep (high, low)
Size: 164 x 82 x 14 mm
Weight: 183 g with batteries and a ramcard
Power: 2 x CR 2032
Complete with soft case

The FX720PF is the same as the FX-720P (ramcard slot more accessible)

Extensions

Memory:
RC-2    2 Kb lithium battery saved
RC-4    4 Kb lithium battery saved

Printer:
FP-12   Thermo printer
FP-12S Thermo printer
FP-12T Thermo printer
FP-40   Thermo printer

Storage:
FA-3     External tape interface
FA-5     External tape interface

Communication:
SB-2      Connection cable