Calculate with Confidence! 📊 Durable anti-fade keys ensure longevity, even in the busiest office environments. Switch between solar and battery power for sustainable usage. Designed with a non-slip structure for reliable performance on any surface. Experience an extra-large display that makes calculations effortless. Enjoy silent touch keys that enhance your productivity without distractions. Solar & Battery Powered Extra Large Display Silent Touch Keys The Casio DS-3B Heavy Duty Office Calculator combines an extra-large display with durable anti-fade keys, ensuring clarity and longevity. Powered by both solar and battery, this calculator is designed for eco-conscious professionals. Its silent touch keys and non-slip structure make it the perfect companion for any office environment.