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DoubleCheck XL - talking low vision calculator

Computers for visually impaired persons!

The business calculator with speech output, with extra-large display and keys combines basic functions, business functions and conversion functions in one device.


  • Extra large 10-digit display
  • Extra large buttons (1.5 x 1.5 cm)
  • 10 memory locations
  • Reciprocal value
  • Percentage calculation
  • Squaring, exponentiating and drawing a root
  • Calculate compound interest, present value and annuities
  • Conversion of currency, temperature, volumes, length and weight
  • Date and time with alarm function
  • Key lock

Technical data

  • Voice output: natural voice, digitized
  • Headphone connection: 3.5 mm jack mono/stereo
  • Power supply 4 x 1.5V AA batteries or mains adapter
  • Power supply connection 3.4/1.35 mm hollow plug socket
  • Operating temperature 0 - 40° Celsius
  • Dimensions (l/w/h) 210 x 170 x 45 mm
  • Weight 487 g (including batteries)
  • Colour royal blue

Scope of delivery

  • Doublecheck XL Voice
  • 4 x 1.5V AA batteries
  • Operating instructions in black letters and on CD

Operating instructions for Double Check XL in German