[High-Quality CO2 Detector] - This portable CO2 meter uses an advanced NDIR sensor to detect carbon dioxide through infrared sensing technology, with high precision, strong anti-interference and excellent stability. [CO2 Concentration Level] - There are three indicator lights on this carbon dioxide monitor - green light for good (400-699ppm), yellow light for medium (700-1499ppm), red light for danger (1499-5000ppm). [Audible Alerts & Custom Alert Values] - When the detected CO2 concentration exceeds 1500ppm, the device will also send out an alarm to remind you. And the CO2 alarm value is customizable. [Portable and Long-Lasting] - Small and portable, you to take this portable CO2 sensor anywhere. Built-in 1000mAh lithium battery, it can be fully within 3 hours, and the battery life is about 72 hours. [HD Full-Color LCD Display] - Full-color LCD display, clear and easy to read, eye protection. If there is no operation for 5 minutes, it will automatically enter the energy-saving ECO mode. [Wide Application] This portable CO2 monitor is suitable for home, office, grow tent and more. product model:PTH-10C Range:Co2:400-5000 ppm Resolution:Co2:1 ppm Accuracy:CO2: * (50 ppm 5 %) temperatuer Spec:-10 - +40 ( 1) Humidity spec 20%-80% (5% RH) CO2 Detector With Temperature Humidity 1. Carbon dioxide detecting 2. Temperature 3. Humidity 4. Buzzer alert 5. Low battery alert Colour:Black-Gray Material:Plastic Package Contents: 1 * Portable CO2 Detector 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.