Optelec
ALVA USB 640 Comfort
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2. Getting to know your ALVA USB 640 Comfort
This chapter will provide you with a detailed description of the ALVA USB 640
Comfort layout.
2.1. ALVA USB 640 Comfort
The ALVA USB 640 Comfort features:
1. 40-cell Braille display
2. eTouch keys (left) for panning left and right, and for screen-reading functions
3. eTouch keys (right) for panning left and right, and for screen-reading
functions
4. Thumb keys for panning left, right, up and down, and for returning to the
cursor position
5. 40 Cursor Routing Keys
6. Mini USB connector
7. On/off switch
When the ALVA USB 640 Comfort is placed correctly in front of you, the Braille cells
are located at the back of the flat surface, and the thumb keys are facing you.
2.1.1. Top and front panel layout
The ALVA USB 640 Comfort design features a row of 40 Braille cells, located at the
back of the flat surface. In front of the Braille cells, you will find a row of small
buttons, which are known as cursor routing keys. Each Braille cell has a
corresponding cursor routing key that can be used for multiple functions. On the left
and right side of the Braille line, you will find two groups of two keys. These are called
eTouch keys, which can be used for Braille panning left and right, and also for
various other screen reading functions.
