Description: This basic carbon monoxide alarm features an advanced electrochemical sensor which requres no replacement. This alarm has a low profile design that will plug directly into a standard wall outlet. It also has a test/reset button to silence the alarm or test the alarm"s electronics, a green light to indicate when it is operating, a red light to indicate when it has alarmed, along with an 85 decibel alarm that will sound when carbon monoxide levels reach dangerous levels. To install - just plug it in. Features: 85-db alarm New electrochemical sensor Test/reset button 5-year manufacturer"s warranty UL listed Power: 120 VAC 60 Hz