1、Aerofoil Fan: The multi wing impeller utilizes aerodynamics technology and strict dynamic balance calibration to convert wind energy into sound energy, significantly improves volume. 2、High Speed Motor: This mini electric warning strobe siren horn features a powerful motor that can attain a rotational speed of up to 10,000 revolutions per second. 3、Premium Materials: Constructed with robust iron, this horn is hard and resistant to deformation, the surface is treated with spray paint for antioxidative and anticorrosive properties. 4、Pure Copper Motor: The motor horn buzzer siren adopts pure copper motor that is not prone to overheating or other damages, contributes to stable operation and a longer lifespan. 5、Heat Dissipation Design: The wide heat dissipation amplification mouth merges the functions of heat dispersion and sound amplification, expanding the sound to reach further distances. Item Type: Motor Horn Buzzer Siren Material: Iron, Copper Frequency: 50/60Hz Volume: ≥110 Insulation Resistance: 100MΩ(at 500 VDC) Voltage Resistance: 500VAC, 50/60Hz in 1 minute Power: 40W Protection Grade: IP44 waterproof Application: Applicable for factory, School, Troops, Entertainment Venue, Ranch, Home Protection 1 x Motor Horn Buzzer Siren