The Sabre Home Security Wireless Door or Window Burglar Alarm HS-DWA is a set of two white wireless door alarms powered by batteries. Each alarm features a 120 dB operating sound rating and comes with self-adhesive backing for easy installation. Designed for indoor use, these alarms offer a secure way to protect your home against potential burglars. With a convenient wireless connectivity option and included batteries, this product provides peace of mind for homeowners looking to enhance their home surveillance system.