Mini design with hanging lanyard. This 3 in 1 carbon monoxide detector features a compact design with dimensions of approximately 85 x 50.6 x 17mm, making it convenient to carry or hang anywhere. Electrochemical sensor technology ensures accurate detection of carbon monoxide. Real-time monitoring with no delay, and data updates every 2 seconds on a color HD 1.9-inch screen, allowing you to monitor environmental air quality continuously. Wide detection range: CO range: 0 to 1000 PPM; Humidity range: 0% to 95% RH. ble alarm activates when CO levels exceed 50 PPM. Built-in 1000 mAh rechargeable battery. Includes one Type-C USB cable. The carbon monoxide detector can operate continuously for up to 50 hours on a full charge. Portable design ideal for both outdoor and indoor use, including camping tents, boats, aircraft, stove heating, vehicles, and other confined spaces. Color: Orange Material: Plastic Package Contents: 1 x Carbon monoxide monitor 1 x Lanyard 1 x English manual 1 x USB cable Note: Light reflection and differences in display screens may cause slight variations in the color of the item shown in the picture compared to the actual product. Measurement error is +/- 1-3 cm.