![4 Ports USB HUB HAT For Raspberry Pi 3 / 2 / Zero W Extension Board USB To UART For Serial Debugging Compatible With USB2.0/1.1 - Walmart.com 4 Ports USB HUB HAT For Raspberry Pi 3 / 2 / Zero W Extension Board USB To UART For Serial Debugging Compatible With USB2.0/1.1 - Walmart.com](https://i5.walmartimages.com/asr/438796b8-953b-4ad6-9fae-45dba00750cd.23e7fbda43b90f42e0e136106a157f8d.jpeg?odnHeight=768&odnWidth=768&odnBg=FFFFFF)
4 Ports USB HUB HAT For Raspberry Pi 3 / 2 / Zero W Extension Board USB To UART For Serial Debugging Compatible With USB2.0/1.1 - Walmart.com
![I2C Shield for Raspberry Pi 4, Pi 3, & Pi 2 with Outward Facing I2C Port Terminates over HDMI Port - NCD Store I2C Shield for Raspberry Pi 4, Pi 3, & Pi 2 with Outward Facing I2C Port Terminates over HDMI Port - NCD Store](https://media.ncd.io/sites/2/20170721151532/TOUTPI2_C_2.png)
I2C Shield for Raspberry Pi 4, Pi 3, & Pi 2 with Outward Facing I2C Port Terminates over HDMI Port - NCD Store
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Original Raspberry Pi 4 Model B 4B RAM 1GB 2GB 4GB 8GB Core 1.5Ghz 4K Micro HDMI-compatible Pi4B 3 faster than Pi 3B+
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Amazon.com: Raspberry Pi 4 Model B 2GB for Game Emulator/Mini PC/Artificial Intelligence/Printer/Workstation/Media Center/File Storage Server/Etc : Electronics
![4 Ports USB HUB HAT For Raspberry Pi 3 / 2 / Zero W Extension Board USB To UART For Serial Debugging Compatible With USB2.0/1.1 - Walmart.com 4 Ports USB HUB HAT For Raspberry Pi 3 / 2 / Zero W Extension Board USB To UART For Serial Debugging Compatible With USB2.0/1.1 - Walmart.com](https://i5.walmartimages.com/asr/448aa735-fcaf-444d-a251-3ecdabaf4e70.f4cc8242445504828c96223b4c121d1f.jpeg?odnHeight=768&odnWidth=768&odnBg=FFFFFF)
4 Ports USB HUB HAT For Raspberry Pi 3 / 2 / Zero W Extension Board USB To UART For Serial Debugging Compatible With USB2.0/1.1 - Walmart.com
![Raspberry Pi 4 Model B - Single-board computer - Broadcom BCM2711 / 1.5 GHz - RAM 4 GB - 802.11a/b/g/n/ac, Bluetooth 5.0 - Walmart.com Raspberry Pi 4 Model B - Single-board computer - Broadcom BCM2711 / 1.5 GHz - RAM 4 GB - 802.11a/b/g/n/ac, Bluetooth 5.0 - Walmart.com](https://i5.walmartimages.com/asr/1b004670-f601-4966-8fa3-d7baf9fcd6ce.a53f95d039539a02a1f38ec50be08900.jpeg?odnHeight=768&odnWidth=768&odnBg=FFFFFF)
Raspberry Pi 4 Model B - Single-board computer - Broadcom BCM2711 / 1.5 GHz - RAM 4 GB - 802.11a/b/g/n/ac, Bluetooth 5.0 - Walmart.com
![Amazon.com: Compute Module 4 to Raspberry Pi 4 Adapter, Connect CM4 to Replace Raspberry Pi 4B, Alternative for Pi 4,Onboard 4-ch USB 3.0,RJ45 Gigabit Ethernet Port,PoE Header,Compatible with Pi 4B Series Hats : Amazon.com: Compute Module 4 to Raspberry Pi 4 Adapter, Connect CM4 to Replace Raspberry Pi 4B, Alternative for Pi 4,Onboard 4-ch USB 3.0,RJ45 Gigabit Ethernet Port,PoE Header,Compatible with Pi 4B Series Hats :](https://m.media-amazon.com/images/I/71NKVqprUNL.jpg)
Amazon.com: Compute Module 4 to Raspberry Pi 4 Adapter, Connect CM4 to Replace Raspberry Pi 4B, Alternative for Pi 4,Onboard 4-ch USB 3.0,RJ45 Gigabit Ethernet Port,PoE Header,Compatible with Pi 4B Series Hats :
![Appendix B. Raspberry Pi ports and legacy boards - Hello Raspberry Pi!: Python programming for kids and other beginners Appendix B. Raspberry Pi ports and legacy boards - Hello Raspberry Pi!: Python programming for kids and other beginners](https://drek4537l1klr.cloudfront.net/heitz/Figures/b0fig01_alt.jpg)