Size: 9CM (diameter)Color: black + redPower supply voltage: 12 (V)Caliber: 3 (mm)Impedance: 8 ()Voice coil: AVSWorking temperature: -10-60 ()Diaphragm material: plasticMaterial: metal + plasticFrequency: 410HZ low frequency 510HZ high frequencyDescription:100% Brand New and High Quality !Our Horn features an extremely powerful directly injected mini-compressor paired with a patented snail design to really charge and amp up the sound! All integrated into one small but powerful device! There is no bulky air compressor, only a small device that produces incredible sound! Its so compact, almost HALF of our customers buy and install 2 horns for double the loudness!Train Horn is Suitable For Almost Any Vehicle! While It's the perfect upgrade for trucks, our horn is also compatible with SUVs, passenger cars, boats and motorcycles. Like we mentioned earlier, The installation process takes less than an hour and is easy to do. Instructions and everything you need is included!Simple Installation, Manual included with every purchaseMade from Quality metals and an ABS construction that wont oxidizeComplete Water and Weather ResistancePackage Includes:1 X Super Train Horn