It can quickly and accurately detect the concentration of gases such as ammonia, provide gas monitoring data, and the safe of the usage environment. High sensitivity: Equipped with highly sensitive sensors, it can respond to changes in the concentration of gases such as ammonia, helping users effectively prevent potential hazards. In a humid, warm environment, ammonia gas is produced faster.Therefore, while detecting ammonia gas, you should also keepings track of the temperature and humidity. It can display gas concentration values and alarm, with sound and light alarm functions, and remind users to pays attention to gas exceeding standards. and convenient: The small size and designs is easy to carry and operate, suitable for gas detection needs in occasion. Measuring Ranges: 0-100PPM Temperature: -9-55 Humidity:0-100% Battery:2500mAh Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Colour:Photo Color Material:ABS Package Contents: 1 x Ammonia Gas Detectors 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.