... phones and suitable to used on MP3/4/5, ipod, PDA and so on, also supply power for built-in speaker ... Ericsson, Siemens, Motorola) Supply power for digital devices (Digital camera, PDA, MP3, MP4,IPOD and so on) Supply power for some ... . The speaker can compatible with MP3,MP4,Music mobilephone,computer.PDA and so on Accessories: Built-in 2pcs blacl speaker 1pcs ...