5 police sirens, shout function, , can easily attract people's attention. A wide range of applications, suitable for models, suitable for most cars with a working voltage of 12V. 12 volts power supply, the car alarm horn is easy to use and install, and the sound is loud and clear. 120dB-150db ​high volume, enough to alert the surrounding passengers or other vehicles. Made of high-quality ABS material, with long service life and stable performance. Sound Level: 120-150dB Power: 100W Voltage: 12V Item Type: Siren Horns Colour: black Material: ABS Package Contents: 1 x Host 1 x Horn 1 x Controller 1 x Accessory Note: The main is connected to the positive electrode of the battery. The black line is connected to the negative pole, and the other 2 green wires are connected with the horn. No installation guide provided, please consult with car audio installer or . Custom installation required. Requires 12V Power delivered to 2 wires. You may have to extend the wire between the speaker and the control module if you are mounting this in your engine bay. You must bolt the speaker to an appropriate place in the grill or under the hood of the vehicle, then wire it to a siren head unit to drive it or connect it to a PA amp. Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.