... 4.CE,ROHS certificate 2.0 usb amplifier speakers system for desktop* Output power:2Watts*2* Frequency Response:100HZ to 20KHZ* Impedance:4Ohms ... speaker units.Also can use 1*2822IC or 2*8002ICWelcome to contact our sales,thanks!Specifications Product size(L ... 100*170 mm Founded in 2006, Shinedee Plastics Electronics CO.,LTD mainly manufactures multimedia speakers, including mini speakers, 2.0 speakers,2 ...