Selling to declutter. Thank you for your interest. Includes: ・Box ・Main unit ・Charger ・Instruction manual Please refrain from price negotiations. ----------------------------------------------- ▼Specifications CO2/Temperature & Humidity Meter/+Style Smart Home Control 【Visualize CO2 with Color】 The screen and smartphone notifications will tell you when to ventilate. 【High-Precision Real-Time Display】 Recommended by the Ministry of Health, Labour and Welfare: Equipped with a high-precision NDIR sensor, capable of measuring from 400 to 9999ppm. 【Graph Display of Past Trends】 You can check the past trends of CO2, temperature, and humidity in daily/weekly/monthly/yearly graphs and export the data. 【Battery Powered, Easy to Install Anywhere】 You can take it to each room or outdoors and measure for up to 20 hours. Suitable for ventilation and air conditioning guidelines in schools, hospitals, conference rooms, and during telework. 【Smartphone Compatible】 Using the +Style app, you can easily check CO2, temperature, and humidity even when you're away from home. Smart CO2 sensor/Smart thermometer. 【Smart Speaker Compatible】 Compatible with AI speakers such as Alexa and Google Assistant, it will tell you the CO2, temperature, and humidity by voice. 【CO2 Manager】 You can see the ventilation timing at a glance. This is a CO2 concentration meter (carbon dioxide concentration meter).