This Safe-T-Alert 85 Series Black Carbon Monoxide Propane Gas #85-741-BL is a must-have for anyone who wants to stay safe while using propane gas. The device is made by Safe-T-Alert, a trusted brand that is known for producing high-quality safety gear. It is designed to detect carbon monoxide gas and propane gas leaks, ensuring that you can use your gas appliances with peace of mind. This product is perfect for those who want to stay safe while using propane gas in their boats or other recreational vehicles. It is easy to install and comes with a manufacturer part number of 85-741-BL. The device is made in the United States, and it is a great addition to any safety gear collection.