Welcome to our store! 1. High Compatibility: Suitable for RPi 1A+, 1B+, 2B, 3B, 3B+, 3A+, 4B, and many other 40-pin Raspberry Pi models to meet diverse user needs. 2. Convenient Connection: Easily connect your Raspberry Pi GPIO and power to peripherals via 8 RJ45 ports, providing a comprehensive range of expansion capabilities for your Raspberry Pi. 3. Flexible Power: Each RJ45 port supports independent selection of Raspberry Pi 5V, 3.3V, or blue terminal power to meet the power requirements of external devices. 4. GPIO Pin Connection: Each of the 8 ports supports various interfaces such as UART, SPI, GPIO, and I2C, making it easy to interact with more peripherals with your Raspberry Pi. 5. Expansion Pin Design: Equipped with 2x20pin expansion pins, it's convenient to expand more peripherals for your Raspberry Pi to meet more innovative and practical needs. Item Type: For Raspberry Pi Breakout Board Material: PCB Number of RJ45 Ports: 8 Expansion Pins: 20 pins x 2 Applicable Models: For Raspberry Pi 1A+, 1B+, 2B, 3B, 3B+, 3A+, 4B RJ45 GPIO Interface: Port 1: UART(RXD TXD) GPIO17 GPIO4 Port 2: SPI(SCLK CE0 MISO MOSI) Port 3: GPIO6 GPIO12 GPIO5 CE1 Port 4: GPIO21 GPIO26 GPIO20 GPIO19 Port 5: I2C(SDA, SCL) GPIO18 GPIO27 Port 6: I2C(SDA, SCL) GPIO23 GPIO22 Port 7: I2C(SDA, SCL) GPIO24 GPIO25 Port 8: I2C(SDA, SCL) GPIO13 GPIO16 1 x Raspberry Pi Breakout Board 100% Satisfaction Guaranteed - Our customers are our priority. If you encounter any problems with the product after receiving it, such as damage or incorrect quantity, please contact us immediately. We will do our best to provide you with satisfactory after-sales service.