A handheld CO detector is small, easy-carry device that help keep you safe from carbon monoxide (CO) gas. Carbon monoxide is colorless, no-smell gas that can be dangerous. It come from stuff like cars, heaters, stoves. If too much CO builds up in a room, it make people sick or even kill. Thats why having a Fixed Online Gas Detector matter so much. These gadget can quick spot if theres harmful CO in air. They easy to use and you can carry them anywhere. Use at home, camping, or travel. With SKZ handheld CO detector, you feel safe from this invisible threat.