NO ACCIDENTLY GONE OFF: 120DB loud + ear- piecing siren + pull trigger design. With normal designed push button, there is a high percentage to set it off on accident. Our improved design help you out of this embracing situation. Just pull out the trigger to activate the siren, and push it back to stop the siren. PORTABLE MOTION DETECTOR: Integrated PIR motion sensor can sense movement within three meters ( ten feets) with horizontal detection angel of 30°. With this super function, you can put it in your front door / bedroom / yard / living room / window to sense breaking in, especially while you are travelling. 35s DELAY FOR SETTING PURPOSE: 35s is the time for setting. If the detector beeps immediately, there be no time for setting. In this case we set it 35s only for the first time the sensor is activated, for the following detection it alarms right away when movement detected. Put it in your purse, tie it to your backpack / school bag or bound it to your door keys or car key. Put it in your survival kit when you decide to go hiking by yourself, it can also be an electronic whistle and SOS flashlight. With a keychain, it is very convenient to be taken with for various situations such as walking, running, jogging, driving, Weight: 0.55556490024 pounds, Manufacturer: Xnuiasqe