The Unisonic 1040-I is an arithmetic calculator with 8 digits precision and algebraic logic. It has 8 functions, 27 keys, and a VFD (vacuum fluorescent) display. The power source is 4xAAA.
Facts at a glance:
If you have a Unisonic 1040-I that is no longer working, you can first try replacing the 4xAAA batteries. If that doesn't solve the problem, then you can consider replacing the calculator with a modern equivalent. We suggest the following current models as possible replacements: