The ideal of the red flashing strobe siren is that when an emergency occurs, press the call button to trigger the siren alarm. You don't need to yell. Press the Cancel button to cancel the alarm,so it will not disturb others for no reason.
Siren alarm with loud 120dB and strobe light fit for indoor or outdoor use. It's big enough to scare away any intruders away from home or office. It can also be notified to people who are far away.
Wide Usage: The strobe siren can be used in home, warehouse, shopping mall, school, hospital, etc. One siren can be paried with multiple transmitters, and one transmitter can also be paried with multiple sirens.
Easy to use: When you receive them and use it immediately. Plug in the power outlet during normal use. Built in rechargeable battery , home security siren can work about 8 hours in case of power failure.
Cancel function?If you have pressed a call botton and got help or no longer need help,cancel button can help you to eliminate the alarm.Not too noisy.