The portable 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 0~1000PPM(10%), the temperature range is 14F~122F( 2.7F), and the humidity range is 0~95%RH(5%). 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), 100~1000ppm (red area flashing = danger). By default, the CO alarm will sound an alarm when it reaches 50PPM. Built-in 1000mAh 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. Carbon Monoxide: 0~1000 ppm(10%) CO Sound Alarm Range: default, 50 ppm Temperature:-10C~50C(1.5C)/14F~122F( 2.7F) Humidity: 0%~95% RH (5%) Battery: Built-in polymer lithium-ion battery (3.7V, 1000mAh) Input: Type-C, DC 5V~DC 24V (Max), support the fast charging protocol with a power of 10 ~ 65W Fast charging protocol: QC2.0, PD3.0, , USB C UFP (BC1.2 DCP ) and other common fast charging protocols (1C) charging Different batches may have different appearances, but will not affect the use Storage Temperature:-20C~60C/-4F~140F Colour:Gray Material:ABS Package Contents: 1 x Mini Carbon Monoxide Detector 1 x USB cable 1 x Lanyard (random colors, don't accept the specified color) 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.