Features: 6 in 1 Portable Air Detector with real time monitoring for CO, oxygen levels, altitudes, barometric pressure, temperature, and humidity, featuring visual alarms and long battery life for outdoor safety. Equipped with an auto adjusting LED screen for clear visibility in all conditions, this lightweight device delivers precise environmental data through sensors and compact ABS construction. Ideal for hikers, campers, and outdoor enthusiasts who prioritize safety during wilderness adventures or high altitudes expeditions. Essential for camping trips, mountain expeditions, or confined spaces where sudden CO levels changes or oxygen depletion require immediate alerts. Engineered with durability and IP54 waterproof rating, its pocket sized design ensures effortless portability while maintaining laboratory grade measurement accuracy. Specifications: Component: Plastic Size: about. 73x33mm/2.87x1.3in Color: 4 color optional Package Includes: 1 Set Air Quality Detector note: Please allow 1-2cm errors due to manual measurement. Due to difference between different monitors, the picture may not reflect the item actual color.