Features:It is made of colorful silicone. Effectively enlarges music from your iPhone 4 4S.13dB of volume amplified. No external power needed.Holds iPhone vertically and horizontally, functions well in hand-free mode.Allows you to enjoy videos and games on the screen at the adjustable angle.Specifications:Color: GreenMaterial: SiliconeCompatible with: iPhone 4 & 4S Item size: 10.6 * 4.7 * 4.2cm (4.2 * 1.9 * 1.7in)Total weight: 40g/1.4ozPackage list:1 * Horn Stand Speaker