Amemo Elegant Design 10 Digits Dual Powered Standard Function Calculator Desktop Calculator (Blue) Ultra elegant and compact design. Dimensions(inch) is 7.5*4.4*04, and weighs 150g (5.3oz). Large buttons made of durable ABS plastic material,good sense of touch and responsive. Floating Decimal Point System.Eye-angled, Upright LCD display for easy viewing. Two-way Power: Solar and button cell battery(LR1130). Auto power off approx 7 minutes. Performs common math as well as various financial functions,Perfect for home or office daily use.