... 1M 3.AC-DC adapter 4.10-Year battery Smoke & Carbon Monoxide AlarmSpecifications : Power Supply: AC-DC adapter ·COMBINED CO, SMOKE ,HEAT ... LED flash ,repeat this alarm pattern) More :DC,AC PoweredBackside2 in 1: Gas and smoke detector, CO and smoke detector, CO ... ( co alarm with 9V DC operated )smoke and carbon monoxide combination alarm installed in your kitchen, you can enjoy peace of mind knowing ...