Don't let the Grinch ruin your christmas and protect your home with 4 x Security Burglar Alarms  With a 120dB alarm sound means you can easily hear the alarm from a distance of up to 230m Easy installation with adhesive tape onto any door, window or wall that you want to protect When the battery is running low a red light will flash so no need to worry about the alarm turning off Measuring at 7.5cm x 3.9cm x 1.2cm, its ultrathin design ensures your home will look great The high-quality round reed switch ensures that there is no error in the alarm Per device is built-in 3pcs replaceable high-quality LR44 batteries  With an 80% saving steal away these 4 Pack of Home Security Burglar Alarms