Room Comfort Sensor

Measure Room Environment and Comfort Temperature, Humidity, Light, CO2, and TVOC 4.2-inch Black & White E-Ink Screen Vivid Emoticon Indication Equipped with Traffic LED and Buzzer Alarm IP30 Rated / NFC Enabled Power: 4 * 2700 mAh ER14505 Li-SOCI2 Battery or 5V/1A by Type-C Port