portable mini spealer. application for mobile phone, MP3, MP4, PC and other audio output devices. Mini speaker.Can be connected to the mobile phone, MP3, MP4, PC and other ... audio output devices.Speaker: OD 40mm 4Ω 2W.Output power: 2W.Frequency response: 80-18KHZ.Lithium output: 3.6V.Lithium input ... 12.4/11.4KGS.Accessories: USB cable, audio cable. USB Mini speaker for mobile phone, MP3, MP4, PC