1. Wireless remote control, easy to operate. The horn can be controlled inside or outside the vehicle via a 4-button remote control. 2. It has 7 tones, which can meet various needs. 3. It provides sufficient volume. 4. It is designed for amateur use or off-road play. 5. Sound level: 120 - 150 decibels. 6. Power: 100 watts. 7. Voltage: 12 volts. 8. Product type: Siren horn. 9. Usage instructions: - Power the siren with a 12-volt power supply or a car battery. - Button A: 4 tones. Press it to switch tones. - Button B: Tone 5. - Button C: Tone 6. - Button D: Tone 7. 10. Color: Black. 11. Material: ABS + metal. 12. Package contents: - 1 speaker - 1 brown remote control 13. Only the above package contents are included, and no other products are provided. 14. Note: Light and different displays may cause the color of the item to vary slightly from the actual object. The allowable measurement error is +/- 1 - 3 cm.