Features:Can be used in cars， motorcycles， mopeds and many other kinds of vehicles， very practical.7 different sounds， can choose them by pressing the red buttons.Shout function， authentic sound， suitable for some important occasions.Press the left button in the sound selector then you can speak what you want to say.Powered by 12V， easy to install and use.With a clip and a doubled-sided tape， can put the sound selector freely.?Specifications:Color: BlackMaterial: PCVoltage: DC12VSound Volume: 150DBLength of Horn Line: Approx. 4.5m?Horn Size: 14.5 * 12 * 7cm / 5.7 * 4.72 * 2.76inHorn Weight: 417g / 14.73ozSound Selector Size: 9.5 * 6 * 3cm / 3.74 * 2.36 * 1.18inSound Selector Weight: 50g / 1.78ozPackage Weight: 15 * 13 * 12.5cm / 5.9 * 5.12 * 4.92in (L * W *£È)Package Size: 554g / 19.53ozPackage List:1 * Horn1 * Sound Selector1 * Clip1 * Double-sided Foam Tape2 * Screws