Feature: - The sound is pure, super loud. - With mounting bracket,the installation is simple. - 3 different kinds of siren sounds,with microphone functions. Notes: - The supply voltage should meet the operating voltage, or can not work properly. - The wiring should be correct, otherwise it does not work. - The speaker wire should be avoided a short circuit. Power: 100w Voltage: 12V Color: Black Material: Durable plastic Type: Alarm horn Model: KX-5011 Diameter: 170mm Impedance: 4Ω Sound level: 120db Current: 5A Package Weight: 645 G / 22.75 Ounces Package Dimensions (L*W*H): 180*175*120 MM / 7.09*6.89*4.72 Inches Package Include: 1 x Horn 1 x Microphone 1 x Mounting Bracket⺠7 TONES - The sound car siren offers 3-5-7 great sounds; a traditional hooter, a ringing fire alarm, a wailing ambulance, a blaring siren, the distinct traffic sound, etc.⺠LOUD AND CLEAR - The sound car siren is handy but loud and clear for its size. You have to be firm and solid when on the PA speaker for volume. The tones can be heard clearly even a mile away.⺠PREMIUM QUALITY - The sound car siren is constructed from premium quality materials to ensure maximum strength and durability for long lasting usage. The kit includes solid state PA microphone assembly for clear voice commands and a 100W Watt siren system that can be heard loud and clear.⺠VERSATILITY - The sound car siren is not only for vehicles, but also anywhere for its appropriate usage. The car siren is also perfect for Security Vehicle-Emergency Response Vehicles (ERV).⺠EASY TO INSTALL - The sound car siren is easy to install just connect the RED wire to a 12V source (inline fuse included). Run the BLACK wire to a ground (or negative battery post). With very large vehicles, the installer may need to purchase additional wiring to elongate the wires. Typical install time is less than a 1 hour. Check your local laws; it may be illegal for this siren to be installed in unauthorized vehicles. It installs anywhere with 12V DC power. INSTRUCTIONS: Power siren with 12V or car battery. The supply voltage should meet the operating voltage and please make sure the cable connection is correct, or it will not work properly.