Feature:1. Efficient Operation: The premium motor of this siren reaches a rotation speed of 10000 rotations per second, ensuring efficient and fast operation.2. Long Lasting Performance: With a sustainable working time of over 40 minutes, this alarm siren is reliable and sturdy for extended use.3. Pure Copper Motor: Made with high strength pure copper, this motor horn alarm siren is resistant to overheating and damage, providing stable operation and a long lifespan.4. Enhanced Volume: Designed with strict aerodynamic technology and dynamic balance calibration, this sound alarm siren effectively converts wind energy into sound energy, improving volume output.5. Sound Amplification and Heat Dissipation: Featuring a large heat dissipation and amplification port, this buzzer sound alarm siren offers simultaneous heat dissipation and sound amplification, ensuring extended sound transmission.Specification:Item Type: Electric Motor SirenMaterial: Plastic, Iron, CopperBracket Installation Hole Distance: Approx. 65mm / 2.6inSize: Approx. 160 x 128mm / 6.3 x 5.04inInsulation Resistance: 100M(at 500 VDC)Power: 40WGuard Rating: IP44Decibels (A)1m: 116dBFrequency: 60HzApplication: Suitable for Residential, Factory, SchoolWeight: Approx. 589.00g / 20.78oz.Package List:1 x Electric Motor Alarm Siren