Dell Inspiron 1521 (Mid 2007) - Manual (Page 184)

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Specifications
Audio
Audio type two-channel high-definition audio codec
Audio controller Sigmatel STAC9205 Codec
Stereo conversion 24-bit (analog-to-digital and digital-to-
analog)
Interfaces:
Internal Intel High Definition Audio
External microphone-in connector, stereo
headphones/speakers connector
Speaker two 4-ohm speakers
Internal speaker amplifier 2 Watts per channel into 4 ohms
Volume controls program menus, media control buttons
Display
Type (active-matrix TFT) 15.4-inch WXGA
15.4-inch WXGA with TrueLife
15.4-inch WXGA+ with TrueLife
15.4-inch WSXGA+ with TrueLife
Dimensions:
Height 222.5 mm (8.8 in)
Width 344.5 mm (13.6 in)
Diagonal 391.2 mm (15.4 in)
Maximum resolutions:
WXGA 1280 x 800 at 262 K colors
WXGA with TrueLife 1280 x 800 at 262 K colors
WXGA+ with TrueLife 1440 x 900 at 262 K colors
WSXGA+ with TrueLife 1680 x 1050 at 262 K colors
Refresh rate 60 Hz
Operating angle 0 ° (closed) to 155°
Viewing angles: