Dell Monitor Stereo Speaker with volume control Model: AX510

Can be hooked under the monitor with a 12v. jack to make like a sound bar under a TV but it's stereo only. 
I had it on a Dell U2410 but can works on other Dell model with 12v output or can be adapted with a wall wart (12v. 1amp.)
with a female plug
From the Dell website it should work with those monitor models:SE198WFP, SP2009W, SP2208WFP, 1708FP, 1708FP-BLK, 1707FPV,  
1908FP, 1908FP-BLK, 1907FPV, 1909W, 2007FP, 1908WFP, 2007WFP, 2009W, 2208WFP, 2209WA, 2407WFP, 2408WFP,
2707WFP, 2709W, 3007WFP, 3008WFP, P2210, P170S, P190S, P2010H, P2210H, P2310H, P2211H, P2311H, U2410, 2209WA

Specifications

AX510  soundbar technical information:

FeatureDescription
Nominal Output Power (Total)  10 Watt
Frequency Response135 - 20000 Hz
Dimensions (W x D x H)13.2 in x 2.2 in x 1.6 in
ControlsVolume knob with power ON and OFF switch  
LEDsPower ON and OFF Indicator
MountingAt the back of the monitor
Power AdapterStand alone power adapter (AX510PA only)