Secure your home with the Bunker Hill Security 2 Pack Door/Window Entry Alarm #94983. This wireless device is designed to detect any unauthorized entry through your doors or windows and alert you immediately using its battery-powered sensor. Made in China, this alarm is compatible with Bunker Hill brand and has a voltage of 5V. It is perfect for indoor use. The pack includes two alarms that come with batteries, making it easy and convenient to install. Get peace of mind knowing that your home is protected with this reliable alarm system.