This product is a air monitor. It is made of solid materials. It is safe and . It can serve you for a long time without being easily damaged. It is an excellent air monitor that can bring you convenience, allowing you to have comfortable experience. Features -Color: White -Material: plastic, electronic components -Size: 12.00X6.30X2.60cm/4.72X2.48X1.02in Error floating: 0-30% Startup warm up: 120s Working voltage: 5V Battery: 850mAh Charging time: about 3h Working time: about 180-240min - Independent sensor, for various detection objects, ensure the detector to have more precise detection. - Can be used in detecting , carbon , carbon dioxide, chemical pollutant and air . - Small size and rechargeable design, you can carry it to detect air wherever you go. - workmanship, reasonable structure, and practical, can bring you convenience. - It is simple in design, but very practical in use, which brings great convenience to you. Package list: 1 x air monitor