Easy to use: Turn the accounts down normally and the screen will start counting. Turn the account and count, silent operation, move down with the thumb to start having the roller, easy to use. Low noise level: displacement and operation count with little noise. And it provides LCD statistical readings that they count, you can erase the digit, after deleting the data, it will automatically turn off. You can restore a zero number and admit automatic dull. The automatic off will not restore the data, the following count will connect to the results of the last count.