Canon was a big player in the calculator industry throughout the ’80s. This LC-34T was one of many models that had functionality beyond the standard mathematic calculations. It also had a clock with an alarm.
Vintage Electronics Have Soul – The Pocket Calculator Show Website
I have one of these in perfect condition. The cover is still really nice and I still have the instruction manual. Still functions like it was new including the alarm, and the slide switch is still tight. As a rule I have to change the batteries once a year, and luckily it’s one of the most common types… LR44.