CISCO Cisco Meraki MT15 - Air quality sensor - with CO2 sensor - wireless - Bluetooth 4.2 LE - 2.4 - 2.484 GHz MT15-HW
TP-LINK Tapo T310 V1 - Temperature and humidity sensor - smart - wireless - 863 - 865 Mhz, 868 - 868.6 MHz - with data storage & export (2 years) TAPO T310