Which usb Speaker should I get among these

Dell AX210 USB 2.0 Desktop Multimedia Stereo Speakers Original Dell Warranty | eBay

KolorFish S-630 USB Laptop Speaker (2.0 Channel) BLACK | eBay

Laptop Speaker 5 Watt Multi Media USB Powered 2.0 Multimedia Speakers | eBay


Dont know about specs of speakers so if anyone knows how to judge a speaker based on its specs then tell me which one would be better