I bought it to adapt monitor with db15 input to micro hdmi for use with raspberry pi 4. Pi stuck at boot. The Pi started easily with a monitor with an HDMI input. Maybe it's this item, maybe it's Pi. I don't know. Since the only thing I have with micro hdmi output is rp4, I am rating this adapter 1 star. I am increasing it to 4 stars. They offered to refund my money and followed after I ignored them. I've been working on adding a USB portable hard drive to my rpi4 over the weekend and have encountered many problems. It's just possible that Rpi4 isn't fully debugged yet. So I'm adding a few stars. I didn't accept their offer.
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