1Accurate: New generation of laser particle sensor, using high accuracy anti interference gas flow sensing detection technology, sensitive to PM2.5 in the air. 2Compact Size: Portable monitoring, back to fresh, where you go, where you measure, master the air quality of different environments 3Application: This air quality monitor is suitable for offices, homes, gymnasiums and other occasion, with a wide range of applications. 4Convenient to Use: Large data show, again far also can see, the bottom special non slip pad, become a work of art on the desktop. 5Premium Material: This air quality monitor is made of high quality ABS material, durable, and can be used with confidence for a long time. Item Type:AirQualityMonitor Material: ABS Weight: Approx. 192g/6.8oz Display Screen: LED Digital Battery Type and Capacity: 2 x AAA Batteries, 450mah (Included) Power Supply: USB Power Supply Working Time: >5 Hours Pm2.5 Detection: 0-999ug /m3 1 x Air Quality Detector 1 x USB Charging Line 1 x Manual