This optical smoke alarm from FireAngel is a reliable and efficient choice for any home. The white colour and sleek design make it a stylish addition to any décor. It is suitable for use with a variety of gases and comes with a battery included for your convenience. The brand name FireAngel is synonymous with quality and this smoke detector is no exception. The model number is FA6620-R and it is manufactured by First Alert. It is perfect for use in any home or business and will provide accurate and reliable warnings in the event of a fire.