The Canon MP25DV-3 is an excellent addition to your desktop. It features a fast and quiet 2-color high-speed ribbon printing system, enabling quick and efficient calculations. When you're not doing number - crunching, the built - in clock and calendar come in very handy. Key features include a double - check function, a detachable pen holder, currency conversion, tax and business calculations, sign change, grand total, memory, percentage calculation, decimal & rounding, backspace, and a built - in clock and calendar.

Using the Canon MP25DV - 3 is easy. First, turn it on and start entering numbers to perform calculations. For double - checking your results, use the double - check function. When you need to convert currencies or calculate taxes, just use the relevant buttons. The detachable pen holder is useful for keeping your pen close at hand. Remember to replace the ribbon when the printing quality starts to decline. Keep the calculator clean by using a soft, dry cloth. Don't expose it to extreme temperatures or moisture, as this could damage the internal components. Also, when not in use for a long time, it's a good idea to turn it off to save battery power.