Feature: 1. High Decibel: The motor alarm can sound up to 135 decibels and has strong penetrating power, making it easy to detect the alarm in time. 2. High Efficiency: High speed rotating dual way wind spiral design, can produce continuous alarm sound, fast and efficient. 3. Screw Mounting: Using screw installation method, 4 screws can firmly fix the alarm on the ground, easy to place. 4. Metal Material: Use aluminum alloy and stainless steel materials, with high hardness and corrosion resistance, can be used in various environments. 5. Wide Applications: Can be used in alarm systems such as mines, ships, airports, blasting, prisons, reservoirs, power stations, etc. Specification: Item Type: Motor Alarm Product Material: Aluminum alloy + stainless steel Product Model: MS-490 Rated Voltage: AC 220V Sound Form: Continuous sound Speaker Decibel: 135dB Insulation Resistance: 100MΩ (500 VDC) Mounting Method: Screw mounting Waterproof Rating: IP44 Usage Scenarios: Alarm systems such as mining areas, ships, airports and other public places, mines, blasting, prisons, reservoirs, power stations, etc.. Package List: 1 x Motor Alarm Note: Pay attention to electricity safety.Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.