The Fire Angel Wi-Safe strobe and vibrating pad is a great product. It picks up signals from the WST-630 smoke alarm to give you an early warning of fire in your home. You can put the pad under your pillow and the vibrations will quickly wake you in case of fire. The strobe activates immediately too, giving you a greater chance of escaping. We think the remote testing function is great too - you can test your smoke alarm easily, without having to reach up to the ceiling!