Kidde Smoke & Carbon Monoxide Detector, 10-Year Battery, Voice Alerts , 1 Count ( Pack of 1) FoxFarm. And there is a stepless

And there is a stepless speed adjustment button

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Kidde Smoke & Carbon Monoxide Detector, 10-Year Battery, Voice Alerts , 1 Count ( Pack of 1) FoxFarm. And there is a steplessBrand: Kidde Color: White Features: 2 units in 1: unit alerts you to smoke & carbon monoxide by sounding a loud, 85 decibel alarm & sounding voice alerts Photoelectric sensor technology senses visible fire particles, while a electrochemical sensor detects CO gas Voice Alarm & an 85 decibel alarm announces a hazard when detected: Fire! = smoke or fire or Warning Carbon Monoxide = CO gas, or "Replace Alarm" when the alarm has reached its end of life