| item | Air quality tester , Air quality meter | 
| Material | ABS | 
| Product size | 240 X 120 X 24MM | 
| CO2 Technology | infrared ( NDIR) | 
| PM2.5 Sensor technolology | Laser Scattering | 
| Detection range | AQI(0-500) 
					PM2.5 (0-999 ug/M³) CO2 ( 400-5000 ppm) HCHO (0.001-1.999Mg/M³) TVOC(0.001-9.999Mg/M³) | 
| Sensor type | CO2 Technology :  infrared ( NDIR) PM2.5 Sensor technolology : Laser Scattering HCHO technolology :Electrochemistry SensorTVOC technolology : Semiconductor Sensor | 
| Power supply | rechargeable lithium battery 3000mah | 
	
	 
 
	