Hello friends, I am sharing my true experiance about Citizen Calculater, I am using my school time, this is one of the best product in citizen, my friends and families used this citizen calculater, This product quality is too much good.this is one of the femous in India.this product screen, buttons, battery quality is too good.I am very happy using the Citizen Product.its really very strong product of citizen. I am recommed to all friend.use this product in your offices, and schools, its very nice product.