... T/T, L/C 2012 new design solar backpack with speakers Our company advantages:1)Lowest price and shipping cost ... power5Wspeaker40mm 4ohmsproduct size(cm)20*11.5*5.3Weight with blister card package317gfrequency 80Hz-18KHzimpedance 4ohmSNR(Signal to Noise ... Ratio) 60dbUsed forMP3, Ipod,Celular,mobile,Iphone,tablet pc,computer,laptop,applied rangehome use speaker, travel speaker, ...