Features 1、3 IN 1 GAS DETECTOR: This device can simultaneously detect CO, temperature, and humidity, making it a versatile tool for any space. 2、CLEAR COLORED DISPLAY, VOICE ALERT: With a large color screen for clear data display and a real human voice alert for urgency, this device ensures you are promptly aware of any changes in the environment, enhancing safety. 3、LOW ENERGY CONSUMPTION, HIGH ACCURACY: Designed for low energy consumption for long lasting use, the CO meter features a high accuracy electrochemical sensor with tremendous interference resistance, and uses a powerful imported chip for accurate computations. 4、COMPACT PORTABLE: This mini device can be easily installed on a desk or wall, and it's also portable for outdoor camping. It is equipped with a hazard level prompt and an easy to read color bar. 5、WIDE APPLICATION: CO gas tester is suitable for a variety of environments such as kitchens, metallurgical and chemical industries, mines, factory workshops, outdoor camping tents, fireplaces, and winter bonfires. It's also capable of continuous automatic monitoring, ensuring your safety at all times. 6、AUTOMATIC SCREEN BRIGHTNESS ADJUSTMENT: The CO meter comes with an automatic screen brightness adjustment feature, allowing for clear visibility in any light conditions. Specification ​Item Type: CO Gas Tester Material: ABS Battery Model: Lithium battery(Shipped with built in battery) Battery Capacity: 1200mah Detection Range: Temperature, 0 to 99℃ humidity, 20 to 80%RH CO: 0 to 1000ppm Charging Mode: Type C Product Color: White Package List 1 x Tester 1 x Manual 1 x Charging Cable