2.0 USB portable mini speaker in Shenzhen 1.570mAh Li-ion cell 2 ... 4.Speaker: 3Wx1 2.0 USB portable mini speaker in Shenzhen Features: 1.USB Mini Speaker is for MP3/MP4/MP5/CD ... /VCD/DVD/Phone/Computer ,etc 2.Stylish&elegant design, Fold speaker, portable ... , play continuously for 4 hours. 5.TF card readability—portable speaker 6.certificate: CE, ROHS, 1 years warranty 7 ...