The CT-300 Carbon Monoxide Detector by First Alert is an essential addition to any home safety plan. Designed to detect carbon monoxide levels from 0 to 5000PPM, this detector ensures you're alerted to potentially dangerous levels of this colorless, odorless gas. The Toptes brand is known for its reliable and durable products, and this carbon monoxide detector is no exception. With its portable design, it's easy to install and monitor multiple locations for peace of mind. Embrace the assurance of knowing your living space is protected around the clock.