Note: The color of the item may vary slightly due to photography and your own computerInstallation: fixed base installation, you can adjust Tuyere up and down Decibel: 120dB,the sound is very loud.Please note that this alarm is not equiped with switch, if you need, please install a switch to control by yourself.High-speed rotating wind screw: the motor drives the wind to rotate in a spiral, producing continuous alarm sound.Mini shape: small shape, small footprint, easy to place.Iron shell, painted with red paint, longer service life.Note:Alarm work time can not exceed 3 minutes, otherwise it will burn outNote:1. If you want to plug the product directly into a standard AC wall socket, you must plug in the male plug first.2. It needs to be fastened to the item you need to place it, because the force of the internal rotating fan will make it tumble if it is not installed firmly.3. Please note that there is no ground wire on the siren.4. It requires separate switchgear, if not, the alarm will sound when power is applied.5. A high-pitched loud siren with a short spring that spins to full pitch and volume almost instantly.Rated Voltage: AC 110V Material: ironandABS BladeDecibel: 120dBAmbient temperature: -40 C - and80 CHumidity: 70 percent Bottom diameter 7.5cm or 2.95inchHeight: 10cm or 3.94inchHole distance: 7.1cm or 2.8inchBody Color: RedNet Weight: 440gPackage Includes:1 x Mini Motor Siren