[3-in-1 Air Quality Tester]: This detector can be used to test and display the concentration of CO, temperature, and humidity at the same time. and portable, the back of the device is designed with a folding stand and lanyard hole, easy to use and carry. [High Accurate Sensors]: Uses high-precise 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 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. Battery:1x1000mAh 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 weight:78g/2.75ounce Colour:Black Material:Plastic Size:84x55x20mm/3.31x2.17x0.79in Package Contents: 1 * Air Quality Monitor 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.