The Unisonic LC 219 Credit Card Size Calculator is a vintage electronic device from the 1980s. This compact calculator, powered by two LR1130 batteries, features a standard numeric keyboard layout with functions including addition, subtraction, multiplication, division, and percent. With a small LCD display and a retro black color, this basic calculator also offers square root and memory functions, making it a versatile tool for financial and basic calculations. Made of plastic, this Unisonic calculator is a unique and nostalgic piece for vintage computing enthusiasts.