Have you ever wondered how good the air quality is in your living room? Or do you need proof of why you fall asleep in a non-ventilated meeting room after 3 hours? Look no further This Air Quality Sensor Combo Board will give you the answers in no time This Air Quality Combo Board detects the quality of the atmosphere by using the popular Ccs811 and Bme280 Ics. It provides a variety of environmental data, including barometric pressure, humidity, temperature, Tvocs, and equivalent Co2 (or Eco2) levels. Communication is possible through the I2C protocol. Ccs811 is a very popular sensor, which provides readings for equivalent Co2 (or Eco2) in parts per million (Ppm) and total volatile organic compounds in parts per billion (Ppb). The CCS811 also has a feature that allows it to fine-tune its readings if it has access to the current humidity and temperature. That's why we added the Bme280, which provides humidity, temperature, and barometric pressure. This allows the sensors to work together to give us more accurate readings than they could give on their own.Since the Ccs811 heats up a bit, the PCB is precisely designed not to affect the readings of the Bme280 sensor. Basic Product Information: •• Instruction Manual Language: English •• Primary Colors: White •• Depth Unit: 3.8 cm •• Height Unit: 15.5 cm •• Width Unit: 7.8 cm •• Weight Unit: 25 G • Technical data: • • Specification kits and modules: Ccs811 and Bme280 Ics Eco2 sensor Tvoc sensor Temperature sensor Humidity sensor Pressure sensor Altitude sensor Operating voltage: 3.3V Eco2 sensing: From 400 to 8,192 parts per million Total volatile organic compound (Tvoc): From 0 to 1,187 parts per billion Temperature range: -40C (-40F) to 85C (185F) Humidity range: 0-100% Rh, =-3% from 20-80% Pressure range: 30,000 Pa to 110,000 Pa, relative accuracy of 12 Pa, absolute accuracy of 100 Pa Elevation range: 0 to 9.2 km (30,000 ft), relative accuracy of 1 m (3.3 ft) at sea level, 2 m (6.6 ft) at 9.2 km (30,000 ft) • Operational characteristics: •• Coding level: 2 •• Electronics level: 2 •• Mechanical skill level: 1 •• Soldering level: None