Your satisfaction is 100% guaranteed. If a product is ever less than completely satisfying, you may exchange it for another of equal value at any time. You may also return any product, within 90 days of initial purchase, for a full refund.
This HOMESAFE WIRELESS HOME SECURITY SENSOR is a double sensor that detects vibration and when your door/window has been opened. It has a wireless radio frequency range of 300 feet. When triggered the RF signal activates the alarm. Uses one 9-volt battery (not included). Easily protect every window and door of your home.