The FireAngel Optical Smoke Alarm 2 Pack FA6615 R is a set of twin 10-year smoke alarms for home use. The alarms are circular in shape and powered by batteries, with a 5-year manufacturer's warranty. They come with an instruction manual, baseplates, and are designed for easy installation with just 2 screws required. The smoke alarms are white in colour and made of plastic. The FA6615-R-T2 model is reliable and efficient in detecting smoke, providing peace of mind for homeowners in case of emergencies.