Multi-function Air Quality Monitor For Home Use 9-in-1 Detector W/LED Display
Suitable For A Variety Of Indoor And Outdoor Activities, And Easy To Carry When Traveling. CO Concentrations Above 50PPM Trigger The Default Carbon Monoxide Alarm. The Alarm Frequency Increases As The Concentration Increases.
10in1 18in1 Air Quality Detector PM2.5 10 PM HCHO TVOC CO2 Formaldehyde Monitor
Tuya WIFI 15 in 1. Tuya WIFI 10 in 1. hope you could understand.