Chuango Outdoor Stobe Siren is a perfect deterrent to a potential intruder. There is a tamper switch on the back of the strobe siren which will trigger the siren and strobe. 105dB.
The WS-280 must be plugged into a mains powered outlet and it also has a built-in battery backup in case of power loss. You can add as many strobe sirens to your alarm system as required.