The 220V siren makes a continuous sound through the motor-driven wind spiral siren, the sound decibel is 120 dB, and the light source type is continuous sound, so it sounds like an electric drill. Widely used temperature range alarm 220V high temperature, low temperature. Fixed base installation alarm 220V adopts the bottom screw to fix the base installation, you can adjust the air outlet up and down. material alarm 220V adopts material, stable working performance and safe to use. Widely used 120db motor driven alarm is widely used in large workplace alarms (such as mines, power stations, airports), natural disaster alarms (such as earthquakes, mudslides, landslides) and public area alarms (such as public buildings, commercial areas, residential areas) )Wait. Quantity: (1 pack) Air screw motor alarm, other products are not included Size: As shown. (for reference only) color: red Note, because there may be color and size difference between the light effect photo and the actual product, please allow 1-2 cm error Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.