The portable 3-in-1 carbon monoxide detector can monitor the current CO concentration, temperature and humidity in the air in real time. Equipped with high-precision sensors, the detectable carbon monoxide concentration range is 0-500PPM, the temperature range is 32-122(2.7) or 0-50(1.5), and the humidity range is 20-80percent RH (5percent RH). The carbon monoxide alarm can display 3-level light indications according to the CO concentration in the air. 0-49ppm (green area flashing = safe), 50-99ppm (yellow area flashing = warning), 100-500ppm (red area flashing = danger). By default, the CO alarm will sound an alarm when it reaches 50PPM. Built-in lithium battery, 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 CO monitor, allowing it to be attached to metal areas such as appliances or cars. Colour:White Material:ABS Package Contents: 1 x Detector 1 x lanyard 1 x USB data cable 1 x 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.