The horn loudness, can issue a warning that can not be ignored, attract more attention, avoid more accidents on the road, help to warn other vehicles and pedestrians, your safety. [General Speaker] - is suitable for DC 12V vehicles such as automobiles and trucks. It is suitable for most motorcycles, all-terrain vehicles, karts, off-road vehicles, pocket bicycles and 12V power cars. Horn Customizable Sound Effects: With a variety of different sound 10 Sound, the Car Horn Sound Effect Controller allows you to personalize your car horn's sound. Adjustable Volume Levels: Each sound effect comes with its own volume level, giving you the flexibility to choose the perfect volume for any situation. Impedance:8() Sound level:150dB supply voltage:A separate controller set is suitable for 12V-24V voltage, and if it is a complete set with speakers, it is only suitable for 12V voltage current:2(A) Working temperature: -60-80() Applicable model:for all kinds of 12V cars,sedan,SUV,and other parts of the motor Note:Installation guide not included, Please check as much as possible to make sure the item is what you need. Tips:The product may be updated constantly,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use Color: As Shown Material: plastic Package Contents: 1 * Electronic Horn Controller 2 * Horn Only the above package content, other products are not included. Note: Light reflection 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.