Turn up the volume of your favorite music with the SoundDr Phone Speaker Amplifier! Its innovative, inductive coupling technology lets you simply place your phone on top of it and turn up the volume. No wires, pairing or set-up is required. The rubberized, textured finish enhances the feel and durability of the amplifier. Better yet, it works with virtually all smart phones and MP3 players. All your phone needs is a built-in speaker and some really great music!