This special talking calculator is a basic scientific calculator with large print and display screen. It's powered by a built-in battery that can be plugged in with an AC adapter if needed. This piece of equipment has up to 75 hours of battery power. But since it has an enormous battery life it takes up to 8 hours of charging. On the top right side of the calculator there's an ear-phone jack in order to listen on what you're currently pressing or haved pressed. But unfortunately there are no built-in speakers. Once a button is pressed, a voice dictates on what you have pressed. There's also an option that can dictate a string of numbers that the user has entered.