Dell W3707C Owner's Manual page 47

Inputs
HDMI (for use as computer monitor)
Audio (PC)
Others
RS232
Outputs
Composite (CVBS)
Audio out (L+R)
Coaxial digital audio out
Optical digital audio out
Audio
Effects
Speakers (separate)
two(bottom)
one (bottom)
one (bottom)
one (bottom)
one pair (bottom)
one (bottom)
one (bottom)
SRS TruSurround XT
Midnight Mode
15 watts/channel
30 watts total
Specifications for Your TV
47