OCRKJ D9-H (AKA KMOON K6-H)
CO2: SenseAir S8 LP (400–2000ppm Accuracy CO2 ±40ppm ±3%, Up to 10000ppm extended range) (30$)
PM2.5: Plantower PMSA003 (16-20$)
TVOC (hydrogen and carbon monoxide): Figaro tgs2600 - pdf (7$)
HCHO: Winsen ZE08-CH2O (22$)
Temperature and humidity: SHT20 (4$)
Accum: LIDIO 3.7v Li-Ion 3000 mAh 963760P (16$)
LCD: 3.5" 320x480 JLT35010A (~10$)