“I bought three of these because the monitor kept cutting out on my Pi 400 and main monitor, and the problem was the adapter I was using, possibly because it put significant weight on the micro-HDMI port. The included cable was fine, but changing out cables on my main monitor is extremely inconvenient. These short adapter cables solved the problem and don't seem to put weight on the micro-HDMI port. One reason for buying three was in case one failed, but all three were fine, so one is semi-permanently attached to my main monitor's "other stuff" HDMI cable, one is stored with other Pi 400 cables in case I take it somewhere, one is left spare for now until I inevitably lose one.”
“An excellent quality adapter which fits my 400 perfect, much better than the solid adapter I had which can cause strain on the socket due to its mass. I thoroughly recommend this short cable.”