* Technical Specification:Power supply: 4*AAA or DC5V/1A ( not including)Rated Power :2 W + 2 W RMSFrequencies Response : 150 Hz~ 20 kHzDrive Unit : 4Ω2WS/N Ratio : 80 DbProducts Size: 161*43*68 mmWeighing:265g ( excluded batteries)*Accessories: Velvet pouch: 1 pcsUser manual: 1pcsUSB-DC cable 1 pcsAudio connector 1 pcs