Designed for car driving, used on the sun visor, will not obstruct driver's view. Made of premium material for long time and durable use. It has a simple design, but very practical in use, giving you a good using experience. Also can be a good gift choice for your friends, they will like it.Features-Color:White-Material: plastic, electronic components-Size:12.00X6.30X2.60cm/4.72X2.48X1.02inError floating: 0-30%Startup warm up: 120sWorking voltage: 5VBattery: 850mAhCharging time: about 3hWorking time: about 180-240min- Can accurately detect carbon dioxide (CO2), (HCHO), carbon monoxide, air quality, chemical pollutants in the air in real time.- One key turn on/off, full control. LED display, display more clearly.- This air quality monitor is suitable for home air detection, car air detection, maternal and child room air detection and public place detection.- Perfect air quality monitor for indoor homes, schools, offices and other occasions.- Simple in structure, easy to use, not easy to deform, you can use it with confidence.Packing list1 x air quality monitor