Long dimension: 28mm X width 12mm X high 10mm
Main chip: Aosun DHT22 temperature and humidity sensors
Working voltage: DC 3.3-5.5V
Fourth, features:

1. humidity measurement range: 0 — 100% RH
2.  humidity measurement accuracy: ± 2% RH
3.  temperature measurement range: -40 — 80 °
4.  temperature measurement accuracy: ± 0.5 °
5.  working voltage: DC5V commonly used
6. single-bus digital signal output, serial data port;