1. Portable micro loudspeaker 2. Loudspeaker output:2W 3. Li-ion battery input: 4.2V 4. Micro Loudspeaker with OEM 1.Portable Speaker, MP3 Speaker, Micro loudspeaker, mini speaker2.Design with different face3.Good sound quality4.mini portable speaker for Mp3, mobile phone, Ipad, ect.5.build in Li-ion battery Portable Micro Loudspeaker