Dell Vostro A90 Setup And Quick Reference Manual page 26

Specifications
Display (Continued)
Controls
Keyboard
Number of keys 61 (U.S. and Canada); 66
(Europe); 68 (Japan); 62
(Korea)
Touch Pad
X/Y position
resolution (graphics
table mode)
26
brightness can be
controlled through
keyboard shortcuts (see
Dell Technology Guide
for more information.)
240 cpi
Touch Pad (Continued)
Size:
Width 62 mm (2.44 in) sensor-
active area
Height 32.5 mm (1.28 in) rectangle
Camera
Pixel 0.3 megapixel
Video resolution 640x480 at 30fps
Diagonal viewing 66°
angle
Battery
Type
Depth
Height
Width
4-cell lithium ion
58.23 mm (2.30 in)
21.5 mm (0.8 in)
140.6 mm (5.54 in)