Boxes do have damage but the detectors are in excellent condition. Keep your home safe with this BRK Carbon Monoxide Detector. It includes a battery backup and can be hardwired or battery-powered depending on your preference. The white detector has an electrochemical alarm and can be used as a Bluetooth-enabled smart device. It weighs 8.8 ounces and comes with one battery. The unit does not require any special installation and is designed for easy set up. This carbon monoxide detector is perfect for any home, and you can rest easy knowing your family is safe from the dangers of carbon monoxide poisoning.