General description This smoke and carbon monoxide detector is a combination alarm that features an audible warning and a digital display. It utilizes advanced electrochemical carbon monoxide sensors, known for their high accuracy and reliability. This battery-powered device is ideal for various indoor environments, including villas, factories, shopping malls, warehouses, and office buildings. Technical specifications Type: Combination smoke and carbon monoxide detector Power source: Battery-powered (requires 3 AA 1.5V batteries, not included) Alarm volume: ≥ 85 dB Sensor technology: High-precision electrochemical sensor and infrared photoelectric sensor Low power consumption design Installation Drill two marked installation holes Use a hammer to insert two plastic grommets into the holes Install the ceiling mount by tightening the provided screws into the plastic eyelets Usage Press the "test" button to check the functionality of the smoke detector and carbon monoxide alarm Operates