Smartmi PM2.5 Air Device Portable Sensitive Air Quality Tester LED Screen Three-color Digital Indicator One-button Operation High Precision Laser Sensor Rechargeable Lithium Battery - White Smartmi PM2.5 Air device indicator utilizes a high thickness laser sensor, its most recent molecule estimate is 0.3μm to the base which can hold PM2.5 esteem in your condition whenever. It can interface with Smartmi PM2.5 Air device to set up the air contamination list go, if air contamination is over the standard range, it will dispatch the Air purifier ace naturally to enhance the air quality. It also has the Green orange and red three-shading advanced pointer at the point when the green light is on, the air quality is astounding; When the orange light is on, it shows mellow air contamination; When the red light is on, it demonstrates substantial air contamination. The Programmed shutdown in 30 minutes, sparing force and strength with the High accuracy laser sensor. Features: One-button operation, simplify design ABS material, excellent hand feel, sleek shape ,small and portable Green orange red three-color digital indicator Green Light on: Excellent air quality; Orange Light on: Mild air pollution; Red Light on: Alert Heavy air pollution. Power Saving auto-shut in 30min Automatic shutdown in 30 minutes, saving power and durability Accurate Detection from time to time Real-time accurate detection with High precision laser sensor. Long standby and HD display Built-in 950mAh rechargeable lithium battery, low energy consumption Specifications: Brand: Smartmi Material: ABS material Rated Voltage: DC5V/1A Rated Power: 3W Battery Capacity: 950mAh Size: 6.2cmx6.2cmx3.7cm Weight:200g Note: It is ecological chain products(smartmi). There is no xiaomi logo on it . Package Includes: 1 * Smartmi PM2.5 device