Note: Do not include Raspberry Pi 4B, Please Buy alone. --------Features Based on Raspberry Pi 40PIN design, It can be inserted directly after welding. Lead out all GPIO function pins to test whether all pins function well. As an TEST BOARD, Lead out all Raspberry Pi 3B/4B/CM4 function pins to test whether all pins function well. As an expanding board, this module includes LED, basic function, You can get started easily. This is a simple expansion board, suitable for beginners of Raspberry Pi. For Raspberry Pi 3B/4B and zero. Comes with demo code and user guide for easy use. Onboard ADDA chip, ADC signals can be read as sensor expansion boards, and DAC signals can be sent out. Onboard industrial wiring terminal port, the terminal has interface definition stickers, Board more beautiful and practical. --------Package Contains Pi ALL GPIO TEST BOARD?B? x1 Screws pack ×1