Note: The color of the item may vary slightly due to photography and your own computer. Installation: fixed base installation, you can adjust Tuyere up and down. Decibel: 120dB, the sound is very loud. Please note that this alarm is not equipped with a switch; if needed, please install a switch to control it separately. High-speed rotating wind screw: the motor drives the wind to rotate in a spiral, producing continuous alarm sound. Mini shape: small size, small footprint, easy to place. Iron shell painted with red paint for longer service life. Note: Alarm working time must not exceed 3 minutes, otherwise it may burn out. Important: 1. If you want to plug the product directly into a standard AC wall socket, plug in the male plug first. 2. It must be securely fastened to the mounting surface, as the internal rotating fan may cause vibration or movement if not firmly installed. 3. Please note that there is no ground wire on the siren. 4. Requires separate switchgear; without it, the alarm will activate immediately upon power application. 5. Features a high-pitched loud siren with a short spring mechanism that reaches full pitch and volume almost instantly. Rated Voltage: AC 110V Material: Iron + ABS Blade Decibel: 120dB Ambient Temperature: -40°C ~ +80°C Humidity: 70% Bottom Diameter: 7.5cm / 2.95 inches Height: 10cm / 3.94 inches Hole Distance: 7.1cm / 2.8 inches Body Color: Red Net Weight: 440g Package Includes: 1 x Mini Motor Siren