With Portable Bluetooth Speakers MD-5W you can:

listen to your phone's audio files on the move and enjoy the room-filling, quality stereo sound
manage your calls from the Bluetooth speakers
let the speakers switch to phone mode from music mode automatically when a call comes in

Technical specifications:
·　Interface                    :  Minimum terminal interface requirement Bluetooth Stereo v2.0 Class 2 with HFP, HSP, A2DP and AVRCP; and a Music Player
·　Battery and outlet     :  Speakers can be powered by batteries (4xAA) and Travel Charger AC-4
·　Operations time with batteries :  Up to 30 h
·　Standby time with batteries :  Up to 550h