Loud boat horns can create a smooth and unobstructed road for you, allowing you to have a more comfortable driving experience!
Product Features: Easy to install, no polarity Huge improvement over the stock horn Has the high and low tone so you can hear them better
Made of ABS material,which is waterproof, anti corrosion and high temperature resistant. 
Product Specification: 
Voltage: 12Volts 
Volume of sound: 130 dB 
High Tone: 510 Hz Low Tone: 410 Hz 
Color: Red and Black 
Material: ABS + Copper + Metal 
Package Includes: 2 x Car Horns 2 x Brackets 2 x Screws 
Warm Tips: 
1.Universal fit for any 12 volt system vehicles. Please check your car stock horns' specification before purchasing. 
2.The horns need to be connected in parallel and the horn mouths down (protect it from mud or water). 
3.For two stock horns, just simply connect the stock plugs, the horns have no polarity, but please make sure the plugs are both positive or negative. 
4.For one stock horn, you need to change 2 plugs to 4 plugs.