Specification: Origin: Mainland China Type: Module Condition: New Model Number: LCD Module Supply Voltage: 3-6v Support I2c Protocol Backlight Or Not Can Be Set By Jumping Up And Down Contrast Can Be Adjusted By Potentiometer Device I2c Address Can Be Modified By Shorting A1/A2/A3, Default Address 0x3f Or 0x70. Available Colors: Blue, Yellow-Green Size:98*60*23mm/3.82*2.34*0.9in 1. The module can be driven directly with the I2C interface LCD2004, and I2C only requires two ports, greatly saving the microcontroller's IO port resources. 2. The module also has a potentiometer to adjust the brightness of the LCD, it is very convenient to use. 3. Can be set through the jump with or without backlighting 4. Contrast can be adjusted by potentiometer. 5. The I2C address of the device is 0X3F or 0x70. Note: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-2cm measuring deviation due to manual measurement. Included: 1*LCD Module 1.Efficient I2C Interface: The 2004A LCD screen module can be easily controlled using the I2C interface, requiring only two pins for communication. By utilizing the I2C protocol, this module significantly reduces the number of IO resources needed on your microcontroller or development board, allowing you to optimize your project's design and connectivity. 2.LCD Brightness Control: The serial interface adapter module features a convenient potentiometer that enables easy adjustment of the LCD brightness. You can fine-tune the brightness level according to ambient lighting conditions or personal preference. This user-friendly feature ensures optimal visibility and readability in various environments. 3.Optional Backlight Configuration: The backlight development board provides flexibility in backlight usage. By simply adjusting a jumper, you can decide whether the LCD module should come with a backlight or not. This allows you to adapt the module to specific requirements, such as power-saving purposes or applications where backlighting is unnecessary. 4.Adjustable Contrast: Achieve the desired contrast for your LCD display with the help of the onboard potentiometer. This adjustable feature allows you to optimize the contrast level, resulting in improved visibility and legibility of displayed content. Whether you need to enhance readability in bright environments or improve aesthetics, this module offers versatility and customization options. 5.Modify I2C Address: The LCD screen module's I2C address can be modified to avoid conflicts when integrating multiple I2C devices into your project. This flexibility allows for seamless compatibility and smooth operation when connecting the module with other I2C-enabled devices. The module comes with default addresses set at 0x3F or 0x70, ensuring ease of use without additional configuration.