4
Key
[2
nd
]
[
Å
]
Function
Instructs calculator to perform the second
[2
nd
]
function of the next key that is pressed
(the function in yellow text on the key).
Backspace key deletes one entry at a time.
It can be used to clear an entire entry by
repeated delete actions.
5
Speech Output
For the calculator to operate in speech mode a headset,
earphone or amplified speaker must be plugged into the
earphone socket on the right side of the calculator and
speech mode selected. . The headset or earphone requires
a 3.5 mm diameter audio jack, should have 32 ohm
impedance, and no more than 100 mWatts power. An
amplified external speaker can also be used – the type used
for portable sound players is ideal. If you are unsure of the
correct device to use please contact Sight enhancement
systems for advice.
