SoundDr "Place & Play" Phone Speaker Amplifier. No pairing no wires and no set-up required. Simply place your phone on top of SoundDr and let its innovative inductive coupling technology turn the music up! Works with virtually all mobile phones and MP3 players. 2x2 watts of crisp stereo sound. Battery or USB powered (3 AA batteries required not included). Rubberized textured finish enhances feel and durability.