Product details of A4 Portade Wireless Speaker * Suitable for MP3 audio file. * Speaker is made up from plastic. * Speaker is able to change the audio's mode key such as Bass and able to skip to last song, next song, turn the volume up / down and able to be paused and played. * Speaker can be on / off by sliding to left / right. * Users can use LIN cable, USB / Pendrive, TF card to trasmit their audio file to the speaker. * Speaker was included one USB cable.