Scare away intruders with the Sonic Entry 4-Pk. Wireless Alarm System. If someone opens a door or window, a loud, startling alarm alerts you. Has 2 audible settings--90dB alarm and chime sounds. Requires no professional installation or tools. Installs in minutes. Includes 4 window/door alarms with self-adhesive backing.

Made from:
Plastic

Measurements:
1"W x 6-1/2"L, each

Notes:
Each requires 3 button-cell batteries