General description Carbon Monoxide and Smoke Alarm Sensor Compound Type Smoke & CO Detector features a PPM LCD display indicator and is designed for battery-powered wireless installation. This device combines high accuracy electrochemical and infrared photoelectric sensors to effectively detect smoke and carbon monoxide, enhancing safety in your home. Technical specifications Item name: Smoke & CO Detector Color: White Battery: 3 x AA battery powered (not included) Working temperature: 0~55℃ Size: 105 x 105 x 40 mm Weight: about 180 g Usage One-click to stop the alarming sound manually. Sound and flashing alarm with LED indicating alarm. This product is specifically designed to detect carbon monoxide and smoke, not combustible gases (e.g., gas, natural gas, liquefied petroleum gas). Other information This compound type smoke and carbon monoxide detector can reduce the occurrence of disasters, but it cannot guarantee foolproof safety. For your safety, please use this product correctly