DATASHEET
https://datasheets.raspberrypi.com/rpi4/raspberry-pi-4-datasheet.pdfThe Pi4B has 1x Raspberry Pi 2-lane MIPI CSI Camera and 1x Raspberry Pi 2-lane MIPI DSI Display connector. These connectors are backwards compatible with legacy Raspberry Pi boards, and support all of the available Raspberry Pi camera and display peripherals. 5.3 USB The Pi4B has 2x USB2 and 2x USB3 type-A sockets.
Raspberry Pi 4 GPIO Pinout | Raspberry Pi | Maker Pro
maker.pro › raspberry-pi › tutorialJul 10, 2019 · The power and ground pins are used to power external circuitry. All Raspberry Pis with the standard 40 GPIO pins will have two 5V pins and two 3.3V pins, always in the same place. Along with the 5V and 3.3V pins, 8 ground pins are available. Power and ground pins are what let your Raspberry Pi power components like LEDs and motors in your project.