Poisonous gas like CO and formaldehyde is harmful to our health. When people get used to badly designed and inaccurate detectors, we decided to design a good-looking and easy-to-use smart air sensor. With Smart air sensor and cloud data analysis, you can monitor and get alerts on air quality in your house on your smartphone in real-time. Smart air sensor can accurately analyze concentration of poisonous gas. When detect the concentration of poisonous gas arises, it will alarm you with chord music. If the concentration of poisonous gas arises to a dangerous degree, it will alarm you with a loud sound, reminding you to take action immediately.