| Note: Installing/replacing batteries or switching between speller   and calculator mode.   If the device fails to respond, or the screen performs erratically,   perform a system reset by following the step below:   Use a paper clip to gently press the reset button located on the   back of the unit.   Warning! Press the reset button with more than light pressure may   permanently disable your device. In addition, resetting your device   erases settings and user-entered information.   |