Clear digital display of gas concentration, to understand the leakage situation, with safety assurance APP remote alarm to the safety of the whole family life Built-in several different voices With high-decibel alarm With automatic product fault checking function When the temperature around detector increases to preset value, the red alarm indicator flashes, the value ring is displayed, "Heat alarm, Check now" is heard and a same text notification is pushed to your mobile. Notice:The temperature display is the temperature of the host. The temperature will be a little higher than the ambient temperature. Colour:White Material:Plastic Size:9x2.8cm Package Contents: 1 * alarm 1 * data cable 1 * matching screw Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.