mobile speaker 1.Applied on:Ipod,mp3,mp4,pc 2.Small size ,easy to carry 3.one year warranty 4.super mini sound box mobile speaker mobile &any other audio players 1.Loudspeaker output:2w2.Frequency response:80HZ-18KHZ3.Li-ion battery output:3.6V4.Li-ion battery input:4.2V+_0.05V5.sUITABLE AMBIENT:-20'c-+50'c6.Dimensions diameter:52mm,hight 31mm7.Weight:50g