Dimensions: 3.3x2.0x0.67 inches, weight:2.oz, Come with lanyard. It is so convenient to carry it or hang it anywhere you want. Perfect to test the air quality, PM1.0/PM2.5/PM10, temperature and humidity. PM2.5 Accuracy: 1ug/m,PM2.5 range: 0-1000ug/m;temperature range: -4-140; humidity range: 0% to 95%RH; testing time: 2 seconds. With this sensor, get the more accurate air quality around in 2s, warn us whether we are in a dangerous air environment. PM2.5: 0-35ug/m, green with "nice" shows, no alarm; PM2.5: 36-75ug/m, blue with "good" shows, no alarm; PM2.5:75-150ug/m, Yellow with "caution" show, alarm with "di-di-di"; Red with "danger" shows, alarm with lasting "di-di-di". Testing process: Turn on the detector, the PM1.0, PM2.5, PM10, temperature and humidity results will show on the HD screen in 2s. After real time working 5mins without any operation, the detector will turn off. With 1000 mAh battery, achieve 75 times of 5 min testing process. All the data shows on the colorful 1.9inch HD screen dynamically in form, the alarm color will change when PM2.5 data changes. get the air quality data more intuitively and conveniently from the . use it in bedrooms, living rooms, kitchens, cellars, cars, grow tents, office, school and more to test the air quality. 5-in-1 air quality detectors Portable for indoor and outdoor PM2.5-PM1.0-PM10 range:0-1000ug/m, PM2.5 Accuracy:1ug/m Temperature range:-4-140 Humidity range:0% to 95%RH Testing time:2 seconds Testing process time:5mins per 1 time PM2.5: 0-35ug/m, green with "nice" shows, no alarm PM2.5: 36-75ug/m, blue with "good" shows, no alarm PM2.5: 75-150ug/m, Yellow with "caution" show, alarm with "di-di-di" PM2.5: 200ug/m,Red n with "danger" shows, alarm with lasting "di-di-di" Colour:Orange Material:ABS Package Contents: 1 * portable co detector 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.