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 in home, 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.