OEM factory specialized in EVA cases FULL-inspection    EVA speaker case Material: PU+EVA+Velvet Size:18*10*5cm color: black/ blue/grey or specified MOQ:1000pcs Pkg: 54*43*40CM/40pcs   Lead Time; about 15-20 days POWERSUPPLY:BATTERY(AA1.5V*2),DC 3.0V(OUTPUT 3V,300-800mA) SPEAKER UNIT:2W*2( OUTPUT POWER:2W*2  4Ohms(1KHz 10% THD) EREQUENCY RESPONSE:275Hz-20KHz