2-Pack 40pin Male to Female IDC GPIO Rainbow Ribbon Cable Breadboard Jumper Wires for TFT Touch Screen LCD Display Raspberry Pi A+/B+/3 B, 20cm/8"

Works just fine to be able to plug a pi tft or hyperpixel into a pi 400

I used one to connect a HAT to a Raspberry Pi 400. Because of the two rows of pins and the gender fluid nature of the connectors it's easy to plug in a board upside down. If you have a multi-meter you can check for the 5 volt and 3 volt pins on the male end. It's the only way to be sure you've plugged in the HAT the right way.

Perfect for attaching my 5" HDMI touchscreen to my Pi's and PiZeroW's. Work great!!

This piece of junk just fried my HyperPixel 4 display! As soon as I turned on the Pi, smoke started coming out from under the display, and now it won't turn on anymore. Sweet... I just lost a $50 display to a worthless piece of crap...

I'm not entirely sure why, but it seems that the male connector on these has extra width on both ends, almost like a 2x22 cable, without the extra pins. I'm not entirely sure why it's designed to be so wide, or if that's part of the standard, but it made it entirely incompatible with the external board I was trying to wire to my Pi, without some kind of header extension on the external board itself. Feels totally like an unnecessary incompatibility, but I guess I should have checked the size blueprints before I bought. Oh well. Cable itself seems to work just fine

OK

The cables did not work as I expected. However, that may be my own misunderstanding of the pinouts, so I can't take off too many points.

Best deal on anywhere and I looked around a LOT so you don't have to! (I just have to find the best bang for the buck on almost everything so I can keep more money in my bank account and every little bit adds up!)