To streamline the system, the Core comes with a 18650 battery case (cells not included) instead of a traditional LiPo battery. AV and HDMI cables are also not included in this kit.
HD3 ships with new lower profile Velcro backed (removable) faceplate foam for a more accommodating fit. The FOV on the HD3 has been dialed back to 42 degrees to maintain a large screen experience while delivering crisp optical performance for OSD readability.
Perfect for anyone looking for the best pair of goggles on the market. With a competitive price, there is no reason not to buy one of these. The only difference between the Core and the regular HD3 is the missing HDMI adaptors, av cable, and batteries. You get the same goggles, with the new upgraded faceplate, the same zipper case, and the new battery case, minus the actual cells that go inside of them.