NX-B02 is a amazing sepaker, whcih you can play music via bluetooth. It lets you enjoy your music of PC, PDA or mobile phone. Yamaha provides three color choices, red, whit and black. Makes your hoem be different. It's attractive and lightweight. And it use fewer battery power than tradition. But one bad thing is that the bass performance lacks at low volume, and a subtle, high-pitched whine can be heard when the Bluetooth feature is activated. Pirce range: US$ 124.98~ US$ 143.36.