Feature: *LCD screen can display 2 lines x 16 characters, operating voltage: 5V; with a potentiometer to adjust backlight and contrast. *Fewer I/O ports are occupied, only four - VCC, GND, SDA (serial data line), SCL (serial clock line), cabling: GND—GND; VCC - VCC; SDA-A4; SCL—A5, LCD display module in yellow-green color. *Supports IIC protocol. The I2C LCD1602 library is included so you can access it directly to adjust backlight and contrast. *Application The LCD module is used to display characters, letters, numbers, real-time clock and temperature. *1602 LCD display with I2C series interface is compatible for Arduino and for Raspberry Pi, Display function: LCD display with I2C series interface can be used to display real-time clock, temperature, humidity, etc. Specification: Part Name: 1602 LCD screen module Color: As shown Size: 80*36mm/3.14*1.41in Material: plastic With IIC: optional Display: 2 lines x 16 characters Backlight: blue screen, yellow-green screen Four Pin Definition: GND, VCC, SDA, SCL Operating voltage: 5V Contrast adjustment: potentiometer Backlight adjustment: Jumper Wiring: GND—GND; VCC - VCC; SDA-A4; SCL—A5 Package Contents: 1*1602 LCD screen module Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data. 1602 16X2 Lcd Module Shield Blue/Yellow Green Backlight 5V Lcd Module Display Made of high quality material, durable and practical to use. Perfect functions,give you a wonderful experience. Every customer can enjoy 30 days refund or replacement for Damaged/Quality Issues. If you have any questions, please feel free to contact us, we will solve it for you.