Musical Function: It is not only a Calculator, but also a musical instrument, which can be used to play some simple music. "CE" Button can switch long, medium and short tone. How to Convert Electronic Piano: First press the "AC" button, then press the "Time/Date" button twice to enter the musical function. Press the number key "1-9" and "+, -, x, ÷, =", the Calculator will make a sound. Multi-Functions: Support add, subtract, multiply and divide calculation function, GT, M+, M-, MRC, etc. Support time, date, alarm, volume control function. Let you work fast and efficiently. Large Display: Electronic desktop Calculator with 12-digits large LCD display. Tilted screen design, clear and easy to read. Ergonomic design, comfortable button. Powered by 2 Pieces AA batteries, easy to use.(Batteries are not included.) Wide Application: The sound is clearer and brighter. Perfect choice for office, business, store, home using. Notes: The voice function is in Chinese, if you mind, please do not purchase this product, thanks for your understanding! Due to manual measurement, the deviation of 1-5mm is normal. Digits: 12 Battery: Powered by 2 x AA Batteries(Batteries are not included.) Item Size: 17.0 x 13.5 x 5.0 cm /6.7 x 5.3 x 2.0 inch Item Weight: 197 g/ 6.9 oz Package Size: 18.2 x 13.8 x 4.1 cm/7.2 x 5.4 x 1.6 in