... stereo audio connector 3,convenient for other audio devices 4, easy to control the volum 5, portable Features:Left and right sound ... contract, you can listen to the music while it is being recharged, easy to carry and convenient to usePower output:2WFrequency response:180Hz ... the resonance chamber, the height is 70mm)Net weight: 80g easy to control the volume , lovely speaker for IPOD/iphone and other ...