The portable 3-in-1 CO2 detector can monitor the current CO2 concentration, temperature and humidity in the air in real time. Equipped with high-precision sensors, the detectable CO2 concentration range is 0-1500-PPM, the temperature range is 32-122℉(±2.7℉)/0-50℃(±1.5℃), and the humidity range is 20-80%RH (±5 %RH). The Carbon dioxide alarm can display 3-level light indications according to the Carbon dioxide concentration in the air. 400-699ppm (green area flashing → safe), 700-1499ppm (yellow area flashing → warning), 1500ppm-X (red area flashing → danger). By default, the CO2 alarm will sound an alarm when it reaches 50PPM. Built-in 1000mAh lithium battery, durable power supply. Support QC2.0, PD3.0, , USB C UFP (BC1.2 DCP ) and other common fast charging protocols 10-65W charging Equipped with a special outdoor lanyard, it is easy to carry, suitable for outdoor activities such as travel, camping, picnic, and adventure. There is also a magnetic feature on the back of the CO2 monitor, allowing it to be attached to metal areas such as appliances or cars. Colour:As Shown Material:ABS Size:About 7.6x7.6x3cm Package Contents: 1 x Detector 1 x English manual 1 x lanyard 1 x data cable 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.