Acoustically designed silicon amplifier dramatically enhances the sound of your iPhone 4 or 4S Features Acoustically designed silicon amplifier dramatically enhances your iPhone 4 or 4S Play music or make handsfree phone calls through this speaker and be shocked by the sound No batteries required Materials Silicon Colours Black White Size 80 x 45 x 55mm Packing Boxed Decoration Position Front of speaker Print Size 30 x 15mm Price includes Pad Print 2 Setup is included