Important Notes: The I2C address of this LCD varies among different built-in chips. Please check the chip to get it. (Refer to "About_I2C_Address.pdf" in downloaded file for details.) * 8574AT chip: 0x3F * 8574T or blank chip: 0x27 Overview: This is an I2C/IIC LCD module that can display 2 lines of characters, 16 for each. It is compatible with most mainstream microcontrollers. Compatible Models: Mainstream models of Arduino / Raspberry Pi / Raspberry Pi Pico / ESP32 / ESP8266 (Note: Other controllers may also be compatible, but no tutorial and code are provided.) Tutorial: Comes with tutorial and example code. (Download needed, no paper tutorial.) The download link can be found on the product box. Package Includes: 1 x LCD module 1 x Jumper wire F/M (4 pin) 1 x Jumper wire F/F (4 pin)