[Outdoor Waterproof & 2.1 Inch IPS Screen]: IP65 life waterproof, multiple protection design, hardcore protection, no fear of rain intrusion, outdoor travel, real-time monitoring of environmental CO concentration to prevent dangers. 2.1 inch IPS color screen, 240 * 296 resolution, wide angle, carbon monoxide concentration, temperature and humidity reading at a glance. [Temperature and Humidity Measurement]: Built-in high-precision temperature and humidity sensor, can sensitively detect changes in temperature and humidity at the same time. Automatic compensation technology to reduce the impact on carbon monoxide detection results and make the detection results more accurate. [Long-lasting endurance buzzer alarm]: Adopt 1000mAh large-capacity polymer lithium battery for long-lasting endurance. When the carbon monoxide concentration is too high, an audible and visual alarm will sound. Data refresh rate: 2 seconds. 0-50ppm concentration does not respond, 51-200ppm cyclic alarm (5 alarms