Ⅰ. This Car Siren Makes 7 Sounds; Roaring, Fire Alarm, Wailing, Police Siren, Clear Traffic Sound, And More. It Has A Pre-Connected Microphone With A Direct Talk Button And A Weatherproof Speaker. Loud And Clear – This Car Siren Is Loud And Of Course According To Size. You have to be firm when using the speaker to increase the volume. Tones are clearly audible even from a mile away. Ⅱ. This car siren is made from a variety of materials to ensure strength and durability.The kit includes a solid-state PA microphone assembly for clear voice commands and a siren system that can be heard loud and clear. Ⅲ. Versatility – This car siren is not intended for vehicles, but for use anywhere. The Car Siren Is Also For Emergency Response Vehicles (ERV). Ⅳ. Easy To Install - This Car Siren Is Easy To Install, Simply Connect The Red Wire To A 12V Source (Fuse Included). Route the Black Wire to Ground (Or Negative Battery Post). If heavy vehicles are used, the installer may need to purchase additional cables to extend the wiring. Typical Installation Time Is Less Than 1 Hour. Ⅴ. Check Your Local Laws; Installation of this siren on unauthorized vehicles may be illegal.It Mounts Anywhere With 12 V DC Power. Ⅵ. Type: Air Signal Power: 20 W, 120 Decibels Voltage: 12 VPrinting: Fits Most Motorcycles, Mopeds, ATVs, Cars, TrucksColor: BlackMaterial: Plastic Ⅶ. PackageContents: 1 X Horn 1 X Microphone 1 X Mounting BracketOnly As Specified AbovePackage Contents, Other Products Not Included. Ⅷ. Note: Due to light reflection and different displays, the color of the item in the picture may be slightly different from the actual item.Measurement Error +/- 1-3Cm Allowed.