This will definately get you noticed if you set it off! It will startle anyone that is not expecting it and probably scare an attacker away. If that doesn't do it, then it will definately draw attention and people will notice whatever is going on around the piercing alarm. It is great for places that pepper spray and tazers are not allowed. I feel like at least my girls have this and although you cannot hurt anybody with it, you sure can scare them to death and buy yourself some time to get away and the attention of witnesses. I highly recommend this product.