Features: This module support popular temperature and humidity sensor (data pin to the module D2pin), WIFImodule ESP12F More matured and stable chip CH340, and reliable charge management chip With defaulted factory test firmware To computer through the port assistant software to realize auxiliary temperature and humidity data (9600baud rate). Module programming and development is completed can also to the 3.7V lithiumed battery to continue to run offlined Specifications: Item: ESP8266 CH340 Development Board Module:ESP12F Size:about 56.88x30.85mm/2.24x1.21in Connection Types: Mini/ Micr/TypeC Optional Package Includes: 1PCS ESP8266 CH340 Development Board note: Due to the problem of lighting effects and shooting there might be tolerances in the product, please understand. Please allow 0-2mm error due to manual measurment. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.