... mobile phone, MP3, MP4, PC and other audio output devices. Mini speaker.Can be connected to the mobile phone, MP3, MP4 ... lithium battery.Material: metal.Product size: diameter 5.2cmx height 8.3cm.G.W. / N.W.: 0.19/0.146KGS.60PCS ... .1cm.G.W. / N.W.: 12.4/11.4KGS.Accessories: USB cable, audio cable. USB Mini speaker for mobile phone, MP3, MP4, PC