DoubleCheck does not only provide the basic arithmetic operations, but also combines numerous other functions in one small and handy device!
Doublecheck includes the basic arithmetic operations – addition, subtraction, multiplication and division – as well as the possibility to calculate percentages, extract square roots, raise a number to a given power or identify the reciprocal.
At the push of a button, you can switch to the conversion menu
and use different preset factors in calculation volumes, length, weight, temperature or currencies.
As commercial calculator Doublecheck also offers the possibility of calculating compound interest, cash values and the amount of annuities. You can recall the date and time
and also set an alarm to remind you of important dates. The numbers are typed in via the big and clearly arranged keys and also shown on the 10-digit-display. At the same time every keystroke is accompanied by clear and natural speech output. The announcement of the results can either be as a total number or digit by digit.
small and ergonomic case, color: blue; big keys, color: grey; dimensions: 15,4 x 1,3-2,1 x 6,4 cm; weight: 125 g (incl. batteries); power supply: 2 x 1.5V batteries type AAA, optional: power charger;10-digit LCD display (7 mm); clear, natural speech output
available in more than 25 languages; volume: 6 volume levels adjustable; earphone plug; keylock; automatic switch-off after 60 seconds
COMPLETE SET: Doublecheck, 2 x 1.5V AAA batteries, printed user manual.