The Doohickey Perfect Alarm 4 Pack Wireless Door Alarm is a reliable home security solution that offers instant alert notifications when triggered. These white, battery-powered door alarms are easy to install with their self-adhesive backing, making them ideal for indoor use. With an operating sound rating of 90 dB(A), these wireless door alarms provide peace of mind knowing your home is secure. Perfect for home improvement projects, this 4 pack of door alarms from Doohickey is a practical and efficient way to enhance your home's security system.