Philips SPA-50 2.0 speaker on Infibeam @ Rs. 439
http://www.infibeam.com/Portable_Electronics/philips-spa-50-2-0-speaker-with-usb/P-poel-17299232625-cat-z.html

About Product:-
2.0 speaker with USB plug for power
3.5 headphone jack
Out put - 3W RMS (1.5w x 2)
Speaker - 2 inch Rotary volume control

Price Comparison:-
Amazon @ Rs. 452
http://www.amazon.in/gp/product/B00TS1GCWC

Flipkart @ Rs. 548
http://www.flipkart.com/philips-spa-50-wired-laptop-speakers/p/itme4dswt62vsps9

Paytm @ Rs. 539
https://paytm.com/shop/p/philips-spa-50-desktop-speaker-black-red-CMPLXCOMPHILIPS-SPA-DUMM141EA9E5BA5