This electronic security system from Defender is the perfect addition to any home. The wedge and window alert alarm is designed to keep your home safe and secure. With its easy-to-use alarm, you can quickly and easily alert you to any intrusion attempt. The Defender Door Wedge and Window Alert Alarm and comes with everything you need to install it. The white alarm is made in the United Kingdom and is perfect for any home. Its compact design means it can be easily concealed and is suitable for use in any room.