This is a great kit, it has almost everything you need to get started with your new Pi 4. My guess is that these are mostly official accessories and that they come with heatsinks and an HDMI adapter cable (most don't include an adapter, use universal cases/power supplies for the same price). I was also skeptical about the need for heatsinks, but after running the Pi for a few hours without them, I was glad to have them on hand to keep the chips a little cooler. Overall very happy with the Pi and this kit.
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