electrochemical sensors, with high sensitivity, superior interference resistance ability, stable working performance, with low power consumption. Digital Color Display: This air quality monitor has a large digital color display, so you can see the data clearly and the screen is not dazzling. And with an electric quantity display function. Low Power Mode: Click the power button, the display can be turned off, enter the low-power mode, continuous monitoring time of about 45 days. Dual Alarm Modes: Supports hazard level alarm and real voice alarm function (supports Chinese and English bilingual switching). The hazard ranking function uses different colors to show the different quality of the air being monitored, allowing you to know the current air conditions more accurately and visually. Nice Heat Dissipation: Multiple ventilation holes reserved on the housing not only accelerate the convection between the air and the machine, thereby realizing effective detection, but also provide a fine heat dissipation effect. Wide Applications: Real-time detection, and automatic data update. Multi-use design, suitable for agricultural planting, greenhouse vegetables, production warehouse, material processing, home interior, business offices etc. Specifications: Material: ABS Color: 4 optional Battery: 1 * 1000mAh lithium battery (included) Display: digital color display Sensors: electrochemical sensor Temperature measurement ranges: 0-99 Humidity measurement ranges: 20-80%RH Carbon monoxide measurement ranges: 0-1000PPM Pre-heating time: 120s Charging mode: 5V Type-C Item size: 84 * 55 * 20mm / 3.31 * 2.17 * 0.79in Item weight: 78g / 2.75ounce Package size: 112 * 112 * 27mm / 4.41 * 4.41 * 1.06in Package weight: 160g / 5.64ounce Packing List: 1 * Air Quality Monitor