Cheap And Discounts Tuya CO Smoke Sensor 2in1 Carbon Monoxide and Smoke Sensor Tuya Smoke Detector Wifi Smoke Alarm 85dB CO Detector Smart Home APP Wholesale. Buy Directly From Merchant IHSENO Factory Store Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.