[Outdoor Waterproof & 2.1-Inch IPS Screen]: IP65 waterproof, multiple protection design, extreme protection, no fear of rain intrusion, outdoor travel, real-time monitoring of ambient CO concentration to prevent danger. 2.1-inch IPS color screen, 240 * 296 resolution, wide angle, carbon monoxide concentration, temperature and humidity readings at a glance. [Temperature and Humidity Measurement]: Built-in high-precision temperature and humidity sensor, capable of simultaneously detecting changes in temperature and humidity. Automatic compensation technology reduces the impact on carbon monoxide detection results and makes them more accurate. [Long-lasting Audible Alarm]: Adopts a large-capacity 1000mAh lithium polymer battery for long life. When the carbon monoxide concentration is too high, an audible and visual alarm will sound. Data update rate: 2 seconds. Concentration from 0 to 50 ppm is unresponsive, cyclic alarm from 51 to 200 ppm (5 alarms in three minutes), continuous alarm