1. Power supply voltage: DC 12V/24V 2. Output power: 250W-500W 3. Current: 10A-24A 4. Sound adjustment method: remote control 5. Waterproof rating: IP66 6. Made of durable plastic for long-lasting performance and functionality. 7. 10 different sound effect options allow you to customize your car horn sound for different occasions. 8. Easy installation; easily connects to various car horns, simplifying setup. 9. Note: Remote control does not include batteries.