This smart sensor can not only detect smoke, but also detect carbon monoxide. For you, you can connect to the TUYA application to receive alerts, which is intelligent and can save you time. Try it,It wont let you downProperties:The carbon monoxide sensor and infrared photoelectric sensor are processed with microcomputer control technology, which has the characteristics of good stability, low power consumption and low cost.Increased sensitivityWidely used: gas water heater, bedroom, living room, parking lot, school, library, factory, hotel, etcWith LED acousto-optic two LALRM functions, it can respond quickly. When the detector gives an alarm, it will give an> alarm sound; 85 dB, providing a better use experienceRemote authentication of TUYA application: After logging into TUYA application, you can verify and receive alerts through the application even if you are far away from homeThe mounting bracket and screw kit are easy to install, and high-quality materials can be used without frequent replacementProperties:Material: ABSWhitePower supply: 2 AA batteries (not included)Operating current: 15UA (standby, lt; 70mA (alarm)Alarm volume: gt; 85 dB (A) at 3mSmoke sensitivity: 0.09~0.17 dB/mCarbon monoxide sensitivity:50 ppm: 60 to 90 minutes100 ppm: 10 to 40 minutes300 ppm: 3 minutesConnect Wi Fi: 802.11 b/g/n @ 2.4gConform to standard 1: EN14604:2005/AC: 2008 (applicable to smoke detector)Conform to standard 2: EN50291:2010 (applicable to carbon monoxide detector)Package size: 125 * 125 * 30mm/4.9 * 4.9 * 1.2inPackage weight: 146g/5.1ozPacking list:1 * Smoke and carbon monoxide sensor1 * Mounting bracket1 * Screw kit