Intelligent detection of types of gas. Most household gases can be detected, without needing to worry about the application. The measurement is displayed on a high definition display, small and design for easy transport. Natural airflow detection technology is adopted to determine air quality problems more accurately. Built-in polymer battery, energy saving and environmental protection, long standby time. It is widely used , office, business, government, school and car, etc. Detect and monitor air problems at any time to the health of family members or employees. Screen size: 2.8 inch. Error detection: Less than 15%. Battery: 3.7V, 1000mAh. Charging standard: 5V, 1A. Standby time: about 240-360 min. Temperature: 18-50 C. Humidity: 10-70% RH. The monitor oscillates 20% -50%. Item size: 136 x 65 x 25mm. Material:ABS colour:Blue+silver Package Contents: 1 * air quality tester 1 * USB cable 1 * English manual 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.