Technical SpecificationRated Power: 2.3×2WResponse 100Hz~20KH Loudspeaker unit4Ω 2W×4 S/N Ratio 85dB Input Sensitivity500mvProduction size:Fold: 200×120×25 mm eploy: 100×120×120mmWeight:weight 330g(exclude battery)Power source Battery: Four AAA alkali or two nickelhydrogenUSB 5V or output: DC 5V / 1A