I have the main unit.
type Electronic organizer
country Japan
year
os sharp
cpu
speed
ram 1 MB
graphic
colors mono
sound beep
power 2*AAA
ports IrDA, optional port
The Sharp ZQ-650M — Advanced ZQ Organiser
The Sharp ZQ-650M was an advanced model in Sharp’s ZQ electronic organiser series — offering expanded memory and enhanced features for the business user who needed more than basic contact and schedule management. The ZQ-650M’s combination of phone book, scheduler, memo, and expense tracking functions in a slim, pocket-sized device represented Sharp’s most capable dedicated organiser offering. Sharp’s commitment to the organiser category throughout the 1990s produced some of the most refined dedicated PIM devices of the era, and the ZQ series represented the peak of this development.