... ,customized color 5,OEM 1,Hamburger speakers2,hamburger speaker with mp33,mini hamburger portable speaker4,customized color5,OEM hamburger ... the frequent battery replacement. fully charged after 6-8 hours of continuous playback. Small cool shape, trendy, personalized with color, fresh ... output:2W2.Frequency response:80Hz-18KHz 3.Li-ion battery output:3.6V 4.Li-ion battery input:4.2V±0.05V 5.Suitable ...