Check the listing for details. 200W Compact High-Performance PA Siren Horn Speaker for Police Car Ambulance. Listed at 55.55 USD. 200W Compact High-Performance PA Siren Horn Speaker for Police Car Ambulance Color1-PcsWattage:200.0 WattsColor: 1-PcsCompatible DevicesCapable with Any 100-200 Watt Siren - 12V/8 Ohms (The speaker cannot be used alone)Voltage12 Volts (DC)Noise Level132 dBCompatible with - Capable with Any 100 - 200 Watt Siren System. The speaker comes with two electrical wires to be connected to a siren controller system. (Note: The speaker cannot be connected to the power supply alone, and must be used in conjunction with the siren system)Universal siren compatibility - This compact speaker is the perfect choice for vehicles of all sizes, including trucks, SUVs, sedans, compacts, ATVs, UTVs and Police, ambulance, fire, engineer, private vehicles, etc.Super Loud - Just because it is small does not mean it is weak. This ultra-thin speaker has a sound compression level of 125-135dB, Impedance: 8 Ohms and a frequency range of 400-4000Hz. Compact design fits behind vehicle's grille or push bumper.High quality - Equipped with Corrosion-resistant heavy duty aluminum body with Black Finish and an impressive IP66 waterproof rating.Package including: 1 x Compact 200 Watt High Performance Extra Slim Siren Speaker (Capable with Any 100 - 200 Watt Siren)Please note for purchase - The speaker resistance is 12V DC/8 Ohm. Before purchasing, please check whether the original speaker of your siren system is 12V DC/8 Ohm. If the original speaker is 4 ohms. Using this 12V DC/8 Ohm speaker will result in a lower sound or not be able to produce sound.