Amazon has First Alert SCO5CN Combination Smoke and Carbon Monoxide Detector for $22.36 with free shipping for prime member or on orders over $25. You can save $32.63 at checkout.
- Keep your family safe with this battery operated smoke and carbon monoxide alarm
- Features an electrochemical Carbon Monoxide sensing technology as well as a photoelectric sensor that detects the larger particles of a smoldering fire
- Indicator lights on the face of the unit display the presence of smoke or carbon monoxide, while an 85-decibel siren provides a clear, loud warning upon detection