SHT-501A v4 2017-3-29 board

Battery 18650 2000 mAh

CO2 Sensor Senseair S8

Thermo and Humidity sensor SHT30

Microcontroller https://www.silabs.com/documents/public/data-sheets/C8051F34x.pdf 

LCD Controller http://www.holtek.com/productdetail/-/vg/ht1621