Amazing silicone speaker that uses acoustics to amplify the sound of your phone without the need for an external power source. The speaker amplifies by up to 19.5 dB, can be used anywhere and is waterproof, impact proof almost indestructible. The details: - Unique design - Washable and durable - Made from high quality silicone - No external power source needed - 19.5 dB of volume amplified - Glows in the dark