Description: 100% brand new and high quality. This module uses the ESP8266-01/ESP-01S (randomly issued ESP-01S or ESP-01) as the master and the DHT11 is the temperature and humidity sensor. The temperature and humidity in the ESP8266 acquisition environment are uploaded to the server. Supports 3.7v-12V DC power supply (3.7V lithium battery). Can be used as a temperature and humidity acquisition node for smart home or IOT projects. Suitable for temperature and humidity control environment, wireless connection, temperature acquisition node. Specification: Material: Plastic + Electronic Components Size: Approx. 2.5 x 2.0 x 1.0cm/ 0.98 x 0.79 x 0.39inch Master: ESP-01/ESP-01S (randomly issued ESP-01S or ESP-01) Temperature and humidity sensor: DHT11 Operating voltage: DC 3.7V-12V (support 3.7v lithium battery power supply) Measurement range: 20-90%RH 0-50 °C Measurement accuracy: Temperature: ±2 °C Humidity ±5%RH Application example: 1. Power supply: 3.7V-12V DC power supply is connected to VCC GND (2.54mm pin header) 2. Download the program to ESP-01S/ESP-01 (randomly send ESP-01S or ESP-01) 3. Insert the ESP-01/ESP-01S (randomly emitting ESP-01S or ESP-01) into the 2*4 Pin header (in the direction of the arrow) Package Includes: 1 Piece Temperature humidity sensor module Note: Please allow 1-3mm error due to manual measurement. Please make sure you do not mind before you bid. Photo color might be a little different from the actual product due to color display of different monitors. Thanks for your understanding and enjoy your shopping moment